Are Grievers considered trolls? Because if they are, they are the worst type of troll (IMO). You'll just be playing online on a server or in a game and that one person betrays the entire team (Halo), Destroys/sets on fire everything you were building (Minecraft), Repeatedly kills you by slamming props into you (Garry's Mod), Locks you in corners so you can't move (COD, especially in Search and Destroy), and I could go on. It is even worse when there isn't an Admin Online on that Server, and as soon as you call one, the griever acts innocent and all his friends on the server back him up. So he receives no punishment, whilst you are regarded an Idiot and kicked around by the Admin for a while.
Although not quite as bad as grievers, I also hate people who are extremely quick to complain about rule breaking. Someone breaks a rule and they instantly start spouting off about how they are going to call an admin and get someone perma-banned. The problem with this is more so when the person broke a rule unintentionally or accidentally, and then the admin believes the one idiot and an innocent gamer gets banned.
Yes all of these are derived from my own experience. Forum trolls can be ignored, people receptively killing you or breaking rules in a game is something thats a lot harder to ignore, as long as you refuse to rage quit, which often is the only way out.
