Sorry about that OP. It suxs.
I feel for you.....the other day i was doing Gardua in a DF group (just wanted fun and to spend some time waiting my friends online). I cured my butt off. After our first wipe the other WHM made comment that i should heal and not just stand there (among other unsavoury comments). I replied with a What? I am! and some other non emotional statements. I think she tried to kick me, because there was a long pause. Nothing happened (we were ready to go, but everyone just stood there). Eventually the tank stepped forward and the WHM said "Oh. OK. lets try again". I think her kick attempt failed.
We beat it after another wipe. I stayed, because in chat people had said they were doing it for the relic, and I remember that long slog so wanted to help them.
Unless I am getting serious abuse, I usually don't rise to it - sometimes even just type lol. I got better things to spend my energy on that trying to be reasonable with people like that (cos u cant be)