My theory is that this community is actually pretty mature (compared to most) and well-behaved (again, compared to most games), so the admins feel the need to actually find something to do when in reality, with the automatic voice chat spam mute, ability to personally mute people you don't want to talk to, kick voting for griefers, leeching reporting, and the penalizing "M" system, there isn't really any admins needed. So in order to flex their e-muscles, stroke their egos, or obtain whatever strange satisfaction they seek, they continue to nitpick and find any reason to use their "powers"
I speak only of my experience in NA servers, and not all NA admins are like this, of course.