The tension between maintaining the original quality and growing the size of the community by several orders of magnitude is, in my opinion, an unsolvable probl

The tension between maintaining the original quality and growing the size of the community by several orders of magnitude is, in my opinion, an unsolvable problem. No amount of arrow-clicking, ignore list or banning can solve this. The easiest way to control the quality of the community is to control its growth. Pay-wall, invites, etc. will all be vastly more useful than after-the-fact approaches. When the barbarians are in the walls, you've already lost.