As a tank my tactic is just to enter the dungeon stay in there for 5 seconds and watch everyone say in group chat "no not HoR" and leaves until im alone. (i actuly like the dungeon)
If i get lucky only one leave after the event is started we wipe and i put on this song : http://www.youtube.com/watch?v=miG9wui0FfQ and rock it and one shot everything and done in 10 min.