People who go back and downvote every post or comment a Less Wrong user has ever made, please, stop doing that. It's a clever way to pull information cascades in your direction but it is clearly an abuse of the content filtering system. It's also highly dishonorable. If you truly must use such tactics then downvoting a few of your enemy's top level posts is much less evil; your enemy loses the karma and takes the hint without your severely biasing the public perception of Less Wrong's discourse.
(I just lost over 200 karma in a few minutes and that'll probably continue for awhile. This happens to me every few weeks. Edit: I mean it's been happening every few weeks for a few months for a total of only three or four. Between 400 and 700 karma lost total I think? I don't mean to overstate the problem.)
I've seen voting patterns like that and my example described elsewhere as being, not exactly biases, but a product of there being two or more ways people use the karma system. AFAICT, different people decide to upvote or downvote based on the answer to one of the following questions:
*Is this comment above my threshold of "good enough to upvote," below my threshold of "bad enough to downvote," or in between?
*Does this comment need more or fewer karma than it currently has?
*Does having posted this comment make the poster deserving of another karma point (or "more karma points than ey has already gotten from it)?
People who see the karma system more as a tool for ranking comments will probably use question 1 or 2. People who see the karma system as a tool for ranking users will use question 3. Also, people who ask question 1 will probably use the anti-kibitzer, while people who use question 2 probably will not.
I had considered one and two before, and strongly prefer one, but it hadn't occurred to me that people might operate by three. And I don't use the anti-kibitzer, mostly because I'm too lazy to get it working, and believe (probably erroneously) that I am not influenced by that. Also, I'd constantly be turning it on and off and then on again, so much so that it would only be frustrating.