Why I now, unfortunately, hate Hacker News..
It's a genuine problem and has been growing gradually worse for a while. I think the cause is simply growth.  When a good community grows, it becomes worse in two ways: (a) more recent arrivals don't have as much of whatever quality distinguished the original members, and (b) the large size of the group makes people behave worse, because there is more anonymity in a larger group.I've spent many hours over the past several years trying to understand and mitigate such problems.  I've come up with a bunch of tweaks that worked, and I have hopes I'll be able to come up with more.The idea I'm currently investigating, in case anyone is curious, is that votes rather than comments may be the easiest place to attack this problem.  Although snarky comments themselves are the most obvious symptom, I suspect that voting is on average dumber than commenting, because it requires so much less work.  So I'm going to try to see if it's possible to identify people who consistently upvote nasty comments and if so count their votes less.