I once got kicked from a pug before a heroic instance even started because someone saw I was in Moonkin form (or "moonkin spec" as he called it) - the fact that I was dreamstate resto (and only picked up moonkin because it's just 1 point and I was already deep enough since I had dreamstate, and it helps loads with grinding) with around 2k healing didn't seem to make any difference

idiot.
I've also seen this situation before:
- Tank dies - I cast Rebirth
- Group soon after wipes anyway
- We all start running back to our bodies, all except for the tank that is
- Upon re-entering the instance I get a whisper from the tank saying "res plz"
- I say "I can't"
- He says "wtf why"?
- I say 25 min CD remaining
- He says something along the lines of "omfg" and then I read "You have been removed from the group"
Ah good times...