I'm pretty sure this is an answer to your earlier question. Humans are corruptible, and thus all countries and governments contain corruption. But the governments that deal with their problems with fiat and secret police are just throwing gasoline on the fire -- i.e., creating an environment of mistrust and fear which only breeds further corruption.

But in general, people also tend to more eagerly report problems in rival groups than in their own. So I think China gets called out more on a primarily US bulletin board just because of the rival relationship that exists. I'd expect the same in reverse on a Chinese bbs.