oh man, an Eilezer Yudkowsky blog on lines! It’s a good day. 
I hadn’t read this—it’s an interesting take on Eternal September. I really liked his point that most if not all communities are constituted by exclusion! Even with messages of universal acceptance and goodwill, someone’s left outside the fold. I think this is one of the resonances I hoped bringing up “[people] are smart enough to know when they’re not welcome” would highlight.
I also sympathize with the call for moderators to feel comfortable using their powers for, like, pruning purposes. Certainly it would be a crying shame if we got so gear-focused that we lost people like @zebra.
All of that said, there were a few things that made me stop and think for a bit that I’d like to mention… I hope I don’t get too far afield from talking about a Code of Conduct. I’m struggling to put my finger on a good quote to pull from the post—maybe somewhere near that paragraph with all the maybes? Anyway, he makes the transition from positing that exclusion is fundamental to all good communities to talking about moderators more or less by arguing that therefore the goal is to find (or become) a good archwizard. It’s a little slippery, but maybe you’ll agree that there’s a little taste of “might makes right” there?
I know the whole post is trying to get us to be suspicious of our egalitarian instincts, but I think maybe we shouldn’t put them away too quickly?