I understand that at least one person has discovered he is banned from my comments. I'm not sure how that happened, because to date I have not deliberately banned anyone. Nor have I intentionally deleted comments, but I know of at least 3 that are gone.
I could have fatfingered it, or it might have something to do with YACCS upgrades. In any case, I'm working on a fix, and my apologies in the meantime.
UPDATE: It should be fixed now. Upgrade your YACCS to get more control over stuff like this. I still don't know what happened to the 3 comments, and can't be sure I didn't lose more.