what valho said.
it seems, more than most mmos ive played, that dps especially are very critical of tanks. slightest mistake and the YOU SUCK comments start flying. don't pull as fast as they'd like? YOU SUCK. they pay no mind to the fact that the aggro issues usually come from THEM PULLING first (which should never happen), firing off AOEs like crazy on a tank unfamiliar with the content or considerably undergeared compared to them.
i see DPS not keeping their head on a swivel all the time...and get aggro from patrols, when i have my mobs safely pulled. i dont start saying they suck because of any of that.
its the attitude of the community in this game that needs to change.