Based on a couple hours of thinking about the article, my interpretation is that fume-induced injuries are likely caused by chronic low-level exposure or rare, transient concentrated buildups of particularly noxious fumes at times or in parts of the plane to which crew are particularly exposed.

If the air routed in from the engine is vented into the crew space and cabin first, then the captain and flight crew might be exposed to more concentrated doses before fumes from occasional oil drops have a chance to diffuse into the total volume of cabin air. If particularly dangerous exposures occur during testing, then crew may be uniquely exposed. Crew members breathe a larger total amount of cabin air, while passengers collectively breathe more cabin air on individual flights, so health issues driven by chronic exposure should primarily affect crew.

The two doctors quoted in the article have each seen about 100 crew and 1 passenger for fume-induced brain injuries, as well as the fact that one of the mass-exposure incidents, in which the plane filled with white smoke, doesn't appear to have caused a definitive mass-casualty event. This sounds like an issue of chronic or spatiotemporally specific exposure that primarily hits crew and rarely hits frequent fliers.

It is beyond question that alternative means of transit, such as cars, are drastically more likely to cause both brain injuries and death than flying. So from a safety standpoint, the question is whether the risk is high enough to be worth cancelling at least one trip entirely. However, if you're only planning on cancelling a small number of trips (i.e. because most are too high-priority to forego), then the extent to which you'd be reducing your chronic exposure is minimal. Based on that, it seems plausibly just not worth worrying about in the absence of better information, given the time and potential stress that would factor into trying to factor this element into your decision making process for each flight.

On the other hand, the case for consistent masking on every Airbus flight for frequent fliers seems strong. KN95 activated carbon masks look like the ordinary masks to which we've become accustomed, but the activated carbon can absorb VOC. You can bring a whole pack and swap out the masks when they reach saturation on long flights. This gives the added benefit of protection from airborn microbes in flight.

You're entitled to your opinion as well as to exercise your mod powers as you see fit.

I would note that Duncan remains the only individual to directly engage with the object-level content of the paragraph in question, beyond to comment on whether they approve or disapprove of it or to (accurately) characterize it as psychologizing. Duncan's clearly angry about it, and while I'm insensitive enough to have (re)posted the original, I'm not insensitive enough to try and draw them into further discussion on the matter since it appears that shutting off discussion is their preferred strategy in this situation.

Questions I think are relevant to directly engaging the object-level content include:

• When is psychologizing appropriate or inappropriate in general?
• What makes it appropriate or inappropriate in this case?
• Setting aside questions of appropriateness, which can include concerns about hurt feelings and community health, is the connection I was drawing between the Obligated to Respond post and the "800 pound gorilla" comment relevant, accurate, or illuminating?

These are some of the questions I'm interested in discussing with respect to this topic.

I also believe that your attempts at posting good-faith critiques in the comments of most LW posts are costlier to you and the community you care about, than they are beneficial. You are swimming upstream and that is unsustainable. Your efforts are best spent elsewhere.

I swim upstream for the exercise ;)

Duncan deleted my comment on their interesting post, Obligated to Respond, which is their prerogative. Reposting here instead.

if a hundred people happen to glance at this exchange then ten or twenty or thirty of them will definitely, predictably care—will draw any of a number of close-to-hand conclusions, imbue the non-response with meaning

Plausible, but I am not confident in this conclusion as stated or in its implications given the rest of the post. I can easily imagine other people who are confident in the opposite conclusions. Let's inventory the layers of assumptions behind this post's central claim that ignoring an internet comment has very high negative stakes.

• First, it depends on the idea that there's a default way that nonresponse is interpreted that you can't really control. But part of the effect of reputation/status is to influence how others perceive your actions, including your choice to respond or not respond. Perhaps it's possible to cultivate an image as a person who maintains their equilibrium and only engages with comments they find interesting.
• Setting that side, people still have to read the comment, update on what it says, and also update on the fact that you haven't yet responded to it in order for the comment to have influence. "If a hundred people glance at this exchange" is a big if, and "10-30% of those who glance will care" is a huge assumption.
• Not only do people have to notice you didn't respond, they have to interpret it as a mark against you, rather than as a positive sign (you didn't get sucked in to arguing with a dumb comment) or neutral (maybe you had other things to do, hadn't seen it yet, didn't feel like responding, etc). Just because people "care" doesn't mean they think ignoring the comment reflects poorly on you.
• Not only does the comment have to directly negatively impact your reputation, the impact has to outweigh any positive side effects. What if someone else does the arguing for you, or the fact people are commenting at all gets you more positive attention, or you get a positive reputation as a person who's tolerant of criticism?

From your linked Facebook post:

The vast majority of people—well over half—seem truly crazy and dangerous to me.  Like being-trapped-on-a-bus-with-a-gorilla kind of crazy and dangerous—it's probably going to be fine, especially if I stay very quiet and don't make any sudden moves, but my continued existence is basically at the whim of this insensible incomprehensible alien entity that cannot actually be predicted or reasoned with and is capable of dismembering me.

I would posit that if you mean this literally, this is a symptom of an extremely unusual and highly dysfunctional anxiety disorder that you may want to seek treatment for if you aren't already. I think that the advice in your posts needs to be interpreted in the context of being from a person who feels this way. You may want to reflect on how the untested assumptions you're making about how the world works, especially the social world, may be a product of your extreme anxiety. 

The majority of those who best know the arguments for and against thinking that a given social movement is the world's most important cause... are presumably members of that social movement.

Knowing the arguments for and against X being the World's Most Important Cause (WMIC) is fully compatible with concluding X is not the WMIC, even a priori. And deeply engaging with arguments about any X being the WMIC is an unusual activity, characteristic of Effective Altruism. If you do that activity a lot, then it's likely you know the arguments for and against many causes, making it unlikely you're a member of all causes for which you know the arguments for and against.

If they decide to hear out a first round of arguments but don't find them compelling enough, they drop out of the process.

The simple hurdle model presented by OP implies that there is tremendous leverage in coming up with just one more true argument against a flawed position. Presented with it, a substantial number of the small remaining number of true believers in the flawed position will accept it and change their mind. My perception is that this is not at all what we typically assume when arguing with a true believer in some minority position -- we expect that they are especially resistant to changing their mind.

I think a commonsense point of view is that true believers in flawed positions got there under the influence of systematic biases that dramatically increased the likelihood that they would adopt a flawed view. Belief in a range of conspiracy theories and pseudoscientific views appear to be correlated both in social groups and within individuals, which would support the hypothesis of systematic biases accounting for the existence of minority groups holding a common flawed belief. Possibly, their numbers are increased by a few unlucky reasoners who are relatively unbiased but made a series of unfortunate reasoning mistakes, and will hopefully see the light when presented with the next accurate argument.

This easily leads to the impression that “retention is bad everywhere”, because all people hear from other group organizers are complaints about low retention. But this not only involves some reporting bias – groups with better retention rates usually just don’t talk about it much, as it’s not a problem for them.

Implied narrative is that we don't hear about successful groups, which is obviously false. Alternative model: most groups, products, etc just don't have much demand/have too much competition. Group founders don't want to just achieve "growth," they want a very specific kind of growth that fits their vision for the group they set out to found. What makes you think there's typically a way to keep the failing group the same on the important traits while improving retention? And if such strategies exist in theory, why do you think that any given group founder should expect they can put them into practice?

This can particularly make sense in cases where we have already invested a lot of effort into something. But if we haven’t – as is the case to varying degrees in these examples – then it would, typically, be really surprising if we just ended up close to the optimum by default.

Who is "we?" You, personally? All society? Your ancestral lineage going back to LUCA? Selection effects, cultural transmission of knowledge, and instinct all provide ways activities can be optimized without conscious personal effort. In many domains, assuming approximate optimality by default should absolutely be your baseline assumption. And then there's the metalevel to consider, on which your default assumptions about approximate optimality for any domain you might consider are also optimized by default. Perhaps your prior should be that your optimality assumptions are roughly optimal, then reason from that starting point! If not, why not?

Immutability: Either, the given property is truly entirely fixed, and cannot be changed at all.

Big difference between "cannot be changed at all" and "the distribution is fixed, but with day to day variation."

What's your motivation to spend a lot of effort to write up your arguments? If you're right, both the post and your efforts to debunk it are quickly forgotten, but if you're wrong, then the post remains standing/popular/upvoted and your embarrassing comment is left for everyone to see

If you didn't have the motivation to write your arguments, why did you waste your time reading the post? If you debunk the author's post, they're unlikely to forget it. If you debunk numerous posts, then you may acquire a reputation. If you debunk a popular post, then many people see the debunking. You've also spared yourself the labor of debunking future posts based on the initial flawed idea. The reward for delivering valid and empathetic criticism is cultivating a community of truth seekers in which you and others may be willing and able to participate. Do you lack that vision? Do you have that outled elsewhere? Do you not care about developing community? Do you simply have better things to do and want to freeload on the community that others build?

Writing up a quick "clarifying" question makes more sense from a status/strategic perspective, but I rarely do even that nowadays because I have so little to gain from it, and a lot to lose including my time (including expected time to handle any back and forth)

You took the time to read the post, but you won't write a "quick" clarifying question because you're worried about wasting your time, and you think you have little to gain by understanding the content, so you're depending on commenters like Said to do the job? If you have the time for just the initial question but not the back and forth, just write the first question and read the response. It takes little more time to put a brief friendly signal at the top of the comment than to leave it out. One may also practice writing in a non-contemptuous manner until it comes naturally, learn to skim posts and read only those clearly likely to be worth responding to. It is possible to deliver low-effort criticism without being a flagrant asshole about it.

If you get rid of people like Said or otherwise discourage low-effort criticism, you'll just get less criticism not better criticism.

How do you know? Have you gathered data on this topic? Have you moderated a community? Have you observed the course of a substantial number of comparable moderation decisions in the past? What exactly is your model of the overall community reaction to such moderation decisions that leads you to this conclusion?

Low-effort and even "unproductive" criticism is an important signal

A signal of what? Important to whom? Are you really interested in what a low-effort troll would have to say in response to what you happen to write and post online?

For example I think any posts by Eliezer will always attract plenty of criticisms due to the status rewards available if someone pointed out a real flaw.

If posts worth criticicizing, due to their intellectual quality and interest of the community, will receive their due criticism, then why can't weak and uninteresting posts can be ignored or engaged with by a charitable volunteer as a teacher might respond to a student in order to develop their capabilities? Targeting weak and forgettable posts for unwarranted criticism increases their prominence in a quite mechanistic fashion due to the high-variance upvotes, the intrigue of seeing why a comment was strongly downvoted, the fact that the LessWrong homepage boosts new and highly upvoted comments, and because the author may feel attacked and respond in an endless comment chain. There are selection effects on who stays in the community under these conditions. Solve for the equilibrium.