This is a change in policy, I've been thinking it over and there's a distinct gap in my very liberal comment moderation policy.
Insulting other commenters, even as a joke, is likely to get your comment silently dropped. Unfortunately, I can't edit your comments, I can only publish them, or dump them. I will err on the side of assuming that when you appear mean-spirited, you are mean-spirited, and will dump comments as necessary. If your comment doesn't appear, feel free to re-make it, with the insults removed! I may even contact you, if your contact info is easy to find!
I realize that this is a new thing, and I am not going to go "clean up" any existing comments. Up until this moment, I had no policy on this (except, arguably, the "don't be a dick" policy, which I admit was rather vague). It has a chilling effect on conversation when you attack one another. Attacking me just makes me talk more, so keep that in mind as well. But I have to be here, nobody else does.