I just found out that a new website feature was implemented 2 days ago. If a comment is voted to -4 or below, it and all replies and downstream comments from it will be hidden from Recent Comments, and further replies in that subthread will incur 5 karma points penalty. The hiding, but not karma penalty, applies retroactively to comments in that subthread posted before the -4 vote.
This seems to be worth a discussion post since most people are probably still voting things to below -3 without knowing the new consequences of doing so.
There is a moderation mechanism designed to do X when users do Y. If this mechanism is good, we should keep it. If this mechanism is bad, we should remove or modify it. But we should not think about this mechanism while voting. That's gaming the mechanism.
Upvote = "LessWrong discussions should have more of this."
Downvote = "LessWrong discussions should have less of this."
That's all. There is nothing more to think about while voting. If you think there should be more things to consider while voting, please explain what and why.
I can imagine a situation where a stupid comment leads to smart discussion. How often? What is the conditional probability that a heavily downvoted comment will have a discussion worth watching? What are the benefits of watching that discussion in Recent Comments? What are the costs of watching an average discussion below a heavily downvoted comment in Recent Comments?
And playing to win is wrong!
There wasn't until karma became meaningful. Now karma has meaning.