I liked the “No Moderator” aspect of Usenet, but as you note that lack of moderation led directly to people either not exercising any self-control or to outright destructive impulses. I think that’s what doomed Usenet more than anything else. The Spam, and the endless/pointless flamewars really did it.
I’ve always posted on-line under my own name- even on Usenet. I’m not one to go off the deep end anyway, but the fact that my name is on everything that I write makes me think twice before I comment.
I also think that the idea of anonymity on-line is a falsehood anyway. The way you fight defines you, probably more certainly than any other communication you make. It’s probably about the most self-revelatory thing you can do in public, and in fact its a lot more personal than posting your picture and your name.