Strict moderation is the reason HN is the only reasonable discussion forum remaining on the internet. I wish good moderation was a skill that more people learned - would you ever be interested in writing a guide or teaching a class on moderation?
This is why dang is so good at what he does as it draws a difficult balance.
As one of the people who loves being that guy in another community: They're not only very good at digging up and pointing out precedents, they likely have systematic archives of everything that remotely relates to the decisions they wish to see made.
I feel like sometimes users with negative Karma like crazy become even more obvious to mods. Sidenote: I still yearn to see what HN looks like to mods and what not. Not to cheat the system but to understand the system more (I love knowing these sorts of hidden details).