The tech solution I'm currently expecting is rate-limiting. Factoring in the costs of development time and finickiness, I'm leaning towards either "3 comments per post" or "3 comments per post per day". (My ideal world, for Said, is something like "3 comments per post to start, but, if nothing controversial happens and he's not ruining the vibe, he gets to comment more without limit." But that's fairly difficult to operationalize and a lot of dev-time for a custom-feature limiting one or two particular-users).
I do have a high level goal of "users who want to have the sorts of conversations that actually depend on a different culture/vibe than Said-and-some-others-explicitly-want are able to do so". The question here is "do you want the 'real work' of developing new rationality techniques to happen on LessWrong, or someplace else where Said/etc can't bother you and?" (which is what's mostly currently happening).
So, yeah the concrete outcome here is Said not getting to comment everywhere he wants, but he's already not getting to do that, because the relevant content + associated usage-building happens off lesswrong, and then he finds himself in a world where everyone is "suddenly" in significant agreement about some "frame control" concept he's never heard of. (I can't find the exact comment atm but I remember him expressing alarm at the degree of consensus on frame control, in the comments of Aella's post. There was consensus because somewhere between 50 and 200 people had been using that phrase in various day-to-day conversations for like 3 years. I'm not sure if there's a world where that discussion was happening on LW because frame-control tends to come up in dicey sensitive adversarial situations)
So, I think the censorship policy you're imagining is a fabricated option.
My current guess of actual next steps are "Said gets 3 comments per post per day" restriction, is banned from commenting on shortform in particular (since our use case for that is specifically antithetical to the vibe Said wants), and then (after also setting up some other moderation tools and making some judgment calls on some other similar-but-lower-profile-users), messaging people like Logan Strohl and saying "hey, we've made a bunch of changes, we'd like it if you came in and tried using the site again", and hope that this time it actually works.
(Duncan might get a similar treatment, for fairly different reasons, although I'm more optimistic about he/us actually negotiating something that requires less heavyhanded restriction)
Update: Ruby and I have posted moderator notices for Duncan and Said in this thread. This was a set of fairly difficult moderation calls on established users and it seems good for the LessWrong userbase to have the opportunity to evaluate it and respond. I'm stickying this post for a day-or-so.
Recently there's been a series of posts and comment back-and-forth between Said Achmiz and Duncan Sabien, which escalated enough that it seemed like site moderators should weigh in.
For context, a quick recap of recent relevant events as I'm aware of them are. (I'm glossing over many details that are relevant but getting everything exactly right is tricky)
LessWrong moderators got together for ~2 hours to discuss this overall situation, and how to think about it both as an object-level dispute and in terms of some high level "how do the culture/rules/moderation of LessWrong work?".
I think we ended up with fairly similar takes, but, getting to the point that we all agree 100% on what happened and what to do next seemed like a longer project, and we each had subtly different frames about the situation. So, some of us (at least Vaniver and I, maybe others) are going to start by posting some top level comments here. People can weigh in the discussion. I'm not 100% sure what happens after that, but we'll reflect on the discussion and decide on whether to take any high-level mod actions.
If you want to weigh in, I encourage you to take your time even if there's a lot of discussion going on. If you notice yourself in a rapid back and forth that feels like it's escalating, take at least a 10 minute break and ask yourself what you're actually trying to accomplish.
I do note: the moderation team will be making an ultimate call on whether to take any mod actions based on our judgment. (I'll be the primary owner of the decision, although I expect if there's significant disagreement among the mod team we'll talk through it a lot). We'll take into account arguments various people post, but we aren't trying to reflect the wisdom of crowds.
So if you may want to focus on engaging with our cruxes rather than what other random people in the comments think.