Back when he capped downvoting to -4, I would definitely disagree with you, because that prevented serious negative outliners. What if the average rounds every

Back when he capped downvoting to -4, I would definitely disagree with you, because that prevented serious negative outliners. What if the average rounds everything under some threshold (say -10) up to that threshold? So your total karma can get totally trashed by one heavily-downvoted comment, but there's a limit to how badly your average gets hit. But really, I'd guess that 99% of comments that go below -10 are clearly intentionally trolling, so it's probably not an issue.