I don't think anyone with harsh and mean spirited things to say would vent it out in the Japanese forum on their side of things. That's what 2ch is for. If you want actual dirt you have to check stuff like http://hakkisi.blog.fc2.com/ . They're going to be civil with stuff that actually has their name attached to it.

As for the community rep thing, I think people would get really angry if they attempted to manage things anymore than they already do. Knowing my fellow Americans people would start yelling censorship and nanny-state micromanagement. If people start completely flooding general with multiple thread about the same thing like the ping issue then yes we do need moderated thread consolidation. But generally people get ruffled about any minor change here for a few days and move on after a while.