Best reason you left a group

i left a ramparts group becuase the leader was a jerk basically. we were on the pull right before the last boss, he put the raid symbols on top of me and the other rogue and i asked him nicely to take em off, they are kinda annoying. he said no. so the other rogue said if you dont take em off he would leave. so the leader kicked him and then i left, i cant stand how people are such jerks for no reason, then me and the rogue went and quested for an hour or so, good times.

what bout all of you, any similar instances?