Re: quis custodiet ipsos custodes...
Slashdot has a meta-moderation setup where random users (with at least a minimum tenure and rating on the site) would get to vote on the quality of the moderation for randomly selected posts. I still think that this has a lot of potential for improving moderation, even if it's just used as a way of ferriting out problematic moderation.
Yeah, I really like Slashdot's approach to both regular and meta moderation.
I don't understand why it never caught on elsewhere.