A lie repeated a hundred times becomes available.

If we keep telling ourselves that LW is full of horrible stuff, we start believing it. Then any negative example, even if it happens once in a while and is quickly downvoted, becomes a confirmation of the model.

This is a website with hundreds of thousands of comments. Just because a few dozen of the comments are about X, it doesn't prove much.

EDIT: And I think threads like this contribute heavily to the availability bias. It's like an exercise in making all the bad things more available. If you use this strategy as an individual, it's called depression.

Just imagine that once in a while someone would accuse you of being a horrible human being, and (assuming they had a record of everything you ever did) would show you a compilation of the worst things you have ever did in the past (ignoring completely anything good you did, because that's somehow irrelevant to the debate) and told you: this is you, this is why you are a horrible person! Well, that's pretty much what we are doing here.