Misuse of magic.

[SicariusSeven]

Actually, in WoW, they made an item that's on the player's discretion to use called the Neural Silencer. It also deals with a lot of other disruptive things in game, like the Toy Train Set. Quite a good little solution to a widespread problem, while letting players still be....well, players.

Which they shouldn't have had to do in the first place. It just sucks that players will abuse good things and use them to cause problems in dungeons and raids.