It's not that hard to understand, really. People get passionate about the things they like. They want to see those things be as successful as they possibly can. When they see a decision made that they think will hinder that, they get cranky. But they're only cranky because they care; nobody complains about the policies at a place they never go to, or gripes when a band they don't listen to changes its sound.

In that sense it's a compliment to PG and the admins that people get so worked up about things like this; it shows they've built something people care about.