Disparate large groups of people will always create friction, and I'm pretty sure you can't force or legislate civility. HN seems a civil place, and succeeds at

Disparate large groups of people will always create friction, and I'm pretty sure you can't force or legislate civility. HN seems a civil place, and succeeds at this with the idea of unlocking functions as a person learns to adapt to the culture and only offer things that the hierarchy agrees with. This is the only real solution, I think; disallowing disagreeable people until they choose to come around to the preferred ideology.