I keep fantasizing about some sort of inception-like system where you could go "deeper" below each subreddit when you chose to, finding a smaller subset of people who'd also gone deeper out of dissatisfaction with convo quality. Maybe it would be one-way gate where you couldn't go back to participate on upper levela. Maybe you comments would still show up above, but the votes in the deeper level would be tallied relative to its users... I keep posting this when quality comes up in discussion, but no one ever bites :)