TrollManagement: modified behavior so that trolls are isolated from each other in a discussion. Previously, trolls could see each other's posts and continue a discussion, despite regular members not see it. This effectively resulted in a sort of meta-discussion only available to other troll users. This update totally isolates trolls from each other, and from regular members entirely.
Merge pull request #108 from vanilla/feature/trollupdate

TrollManagement: isolate trolls from seeing each other.