Healer here. *waves hand*
People who scream GOGOGOGO, just don't get healed. Period.
People who stand in aoe when there is room to stand somewhere else. Same. Or they get LoFed to me *laughs* Funniest Holy spell I have. Always leaves them completely disorientated <3 (and out of harms way, of course)
Tanks who don't allow CC to be used because 'they can take it', will find themselves dead, too.
But.. I do dps, as well. I quite like shadow in Cata.
When I get a bad pug, I really just do my own thing. If a mob is wacking the healer, I MC it and dps/ heal with that mob instead.
Pugs are horrible at the moment because 99% of players you encounter still think HCs in Cata are the same as HCs in WotLK.
No, you can't faceroll an HC. And I quite like you can't. *shows off his knowledge of his class*