About a year ago, a friend wrote a good post about diversity in hackathons which was submitted to HN and hit #2 quickly, then dropped down to the second page in an instant: https://news.ycombinator.com/item?id=6495950
Not many people commented on it. I believe the flame-war detector only takes significant effect when # comments > # points, which is a pretty good heuristic for a flame war that has gone out of control.