tanks are so loving stressful in world of warcramps, you have the one dipstuff hunter in the group with his pet stuck on taunt, which you'll constantly be fighting for the aggro.
this hunter will then say "wtf tank taunt!!" while still being loving blind to his pet.
after that, you'll have the entire group hounding on you for loosing the threat of the boss for one microsecond.
proceed to get kicked out of the raid and guild for being a "bad tank", rinse and repeat.
this is why healers are good stuff, just gotta click a few buttons now and then when someone accidentally steps into the fire.