Thanks for the response; those seem like good learnings.

In terms of hot-button-topic stories getting buried, it's not just flagging - the flame war detection logic also plays a role. On diversity stories, for example, once they reach the front page we often see a large number of strongly worded (but clearly legitimate) anti-diversity posts. When people reply, heavy discussion ensues; and in any case, there's often a lot of piling on in agreement. Pretty soon the post is back to page 3 or 4. Of course there's the option of not replying, but leaving the anti-diversity viewpoint unchallenged strongly reinforces the stereotype of HN as a place that's hostile to diversity. So right now there isn't any good answer.