If you mean the moderators of HN, I'm one and all I consciously care about is saving this site from sucking with tedium. So if anybody is "actively policing" HN, they have figured out how to hack my unconscious and I wish they'd share how they did it. That would actually be interesting.
The problem with tedium is that it's human nature for us all to care most about the sound of our voice and the sweet sweet beauty of our own words on the screen. We don't notice when we're repeating things that have been said millions of times because those lacked the flagship merit of it being me who was saying them.
This little me is the arch-enemy of intellectual curiosity (https://news.ycombinator.com/newsguidelines.html). It is the same in everyone and has nothing to do with pro- or anti-China, or pro- or anti-anything.