Since you asked... I've always thought you should be a bit more rigorous about eliminating the sorts of "rah rah!" topics that get people fired up. That's not a technical solution, but it's not really a technical problem either.
What I mean by "rah rah" things includes political articles that make people think "right on!" Paul B's article on Proposition 19 falls into that category for me: I strongly agree with him.
But when I step back and look, I think that I don't want to read everyone's "rah rah" articles because they tend towards flame wars, and, if opposing views are trampled to the point where those people go elsewhere, group think. I also think that, since they are topics that anyone can have an opinion on, that they are much more likely to draw people only marginally interested in the core topics of "hacker news". Those people in turn will submit more articles about politics. At a certain point a few days ago, between Prop 19, John Carmack's libertarianish views, and something else I don't recall, the top three spots on HN were occupied about articles that were essentially political in nature.
I would much prefer that articles like that one, much as I agree with it, and think Paul B is an awesome guy and a great contributor here, were ruthless pruned from this site.