Blog comments are evil. We shouldn't be engineering new ways of making them less evil; we should be progressing towards a new set of norms in which people who write blogs don't feel obligated to let the rest of the Internet pee all over their work.

Forums like HN do the job of blog comments, but better, because we have some basic rules of engagement here that make trolling less gratifying.

No reason why blogs can't also have rules of engagement.

I have a Livejournal, and I thoroughly enjoy the discussions in the comments on it. I wouldn't bother posting if there weren't responses to the things I say.