Related to: Well-Kept Gardens Die By Pacifism.
I wrote a script for the greasemonkey extension for Firefox, implementing less painful downvoting. It inserts a button "Vote boo" in addition to "Vote up" and "Vote down" for each comment. Pressing this button has 30% chance of resulting in downvoting the comment, which is on average equivalent to taking 0.3 points of rating. If pressing the button once has no effect, don't press it twice: the action is already performed, resulting in one of the two possible outcomes.
The idea is to lower the level of punishment from downvoting, thus making it easier to downvote average mediocre comments, not just remarkably bad ones. Systematically downvoting mediocre comments should make their expected rating negative, creating an incentive to focus more on making high-quality comments, and punishing systematic mediocrity. At the same time, low penalty for average comments (implemented through stochastic downvoting) allows to still make them freely, which is essential for supporting a discussion. Contributors may see positive rating of good comments as currency for which they can buy a limited number of discussion-supporting average comments.
The "Vote boo" option is not to be taken lightly, one should understand a comment before declaring it mediocre. If you are not sure, don't vote. If comment is visibly a simple passing remark, or of mediocre quality, press the button.
Agreed. I strongly feel that comments of a few words expressing thanks, agreement, apology, sympathy, approval, acknowledgement, etc. should simply hover at zero. Such remarks are part of the native architecture by which we communicate, and I think we lose something if we discourage them.
I agree with the descriptive content of what you wrote, but not the normative content. I agree that we do lose something if we discourage these sorts of comments. However, short comments that don't add anything to the discussion (like the ones you mention) do add a significant amount to what gets displayed on the screen. If someone is reading this with a screen reader, a text browser, an iphone, or even just a small laptop or old, low-res display, then they will have to wade through "MBlume 22 April 2009 07:55:59AM* 8 points [-] Thanks - I agree. V... (read more)