This is by far my favorite suggestion, although I think that the messengers should be hand-picked, not based on karma. I make a lot of lousy comments, because

This is by far my favorite suggestion, although I think that the messengers should be hand-picked, not based on karma. I make a lot of lousy comments, because I don't really have a lot of respect for the quality of discussion here. But, you know, if I got private feedback a few times -- even from people who were powerless to punish me -- that my comments were bad, then I would actually stop.