In AQ40, there seems to be a bug that will kick players from the server. Both players must have a bug mount (kicker and kickee). We found it out in the Twin Emps room. No idea if it works elsewhere.
Here is what you do:
Have a player autofollow you (such as after a wipe when you are running back to C'thun) and start running in circles (Hold A + W at the same time). For some players, it will disconnect them from the server and sometimes will give them connection issues upon trying to reconnect.
It's that simple! What this does is, sort of like how you get disconnected for spinning, disconnects the player because it simulates the spinning.
Have fun griefing