This is sort of a 2 way thing. Heck just the other day 3 of us from the fc (other 2 were new to th dungeon) did Tam Tara HM,
well the random tank decided to do mass pulls, i used Quelling Strikes a nd even waited a little bit before i attacked and guess what i got agro on almost every mob.
We did manage to get to the final boss upon which i only realized then my allies from the fc were new there so had no time to explain it, so yes we did wipe.
Upon this point the tank said what the hell and learn to do your #&*!^~% jobs. So the healer said cool it dude and he left. So not only tanks get no respect.
Myself i have great respect for tanks and healers just not d bags like the one i mentioned