Topic Happyunicorn of Magic.
Today I was in a heroic group with a boomkin from Burning Blade, called Happyunicorn.
As we kept failing on last boss, the guy left and somehow bugged the instance (Grim Batol), so we couldnt enter it (Teleport to instance, and would be teleported out 5 seconds after), while he was just sitting at the entrance, cursing and laughing at us.
After doing heroics all night trying to get my last piece of reputation, this guy had to waste the time of not only me but also the other people of the group and all the newcommers (even dpsers that had to wait 30ish minutes to get in).
I think this is unacceptable and that someone (atleast the higher ranked people of his guild) should tell him off.