Anil Dash has a really good semi-ranty piece out called “If Your Website’s Full of Assholes It’s Your Fault” which really is a must-read, I think. We moderate comments here pretty strongly–you can read our comment policy here if you like–but the reasons we do it are pretty well outlined in Dash’s piece. We got to the same place he did on our own, and there’s a little flexibility in what we let through because we have a bunch of different people who have the power to approve or trash comments. Sometimes we don’t agree, in other words. Judging assholery is more an art than a science, after all. But that’s why we do it. We want conversations, not shouting matches.