I strongly dislike anonymous voting, because this is a different context than Reddit - a rationalist ought to be prepared to defend their judgments. Similar reason why I don't like drive-by downvotes.
The principle is sound, but what about the time cost? I downvote maybe two or three comments a day, more if it's a particularly bad day. I'm not prepared to write an essay explaining exactly was wrong with each of them, especially if the original commenter wasn't prepared to take three seconds to write a halfway decent response.
Also, we are not immune to status effects. If I wanted to downvote one of Eliezer's comments, I would feel really awkward having to explain to him why I was doing so and why I thought he wasn't contributing productively to the conve...
[Edit: Issues, Bugs, and Requested Features should be tracked at Google Code, not here -- matt, 2010-04-23]
Less Wrong is still under construction. Please post any bugs or issues with Less Wrong to this thread. Try to keep each comment thread a clean discussion of each bug or issue.
Requested features... sure, go ahead, but bear in mind we may not be able to implement for a while.