Yeah, I'm going to pick on warriors. I've been running instances from the teens up through the high 20s on Rhododendron and Brynhild, and while occasionally you'll get something like Softi's hunter with a growling, aggressive pet, or someone DPSing in Ragefire Chasm in bearform (because they don't have cat yet, and evidently missed that part of the pesky tooltip for Maul (Rank 1) that says it causes high amounts of threat), the biggest issue I've had has been with warriors. Absolutely. Idiotic. Warriors.
Our latest shining winner, Darca of Drak'thul, ended up in a Stockades run with us after one of our DPS unexpectedly had to go, shortly before fighting Bazil. No, not Basil, Bazil. (Side note: Stocks sucks as Horde. The only thing I get out of it? Lots of wool.) Shoulda known something was up when as soon as she zoned in, she ran directly to the first mob in front of her, hit it with her sword, and Thunderstomped. Pardon me... what? Feral Faerie Fire, Growl, quit stealin' mah mobs.
So we got to the three-way room before Bazil, and I couldn't remember if it was him or Dextren Ward that has the fear (spoiler: it's Dextren), so we went to clear the side rooms. I had no more than turned my fat furry bear ass to face the room before Darca ... once again pulled. The entire room. My only response was "you know you're not the tank, right?" No response. Once again, I grabbed threat back, we beat up all the inmates, we beat up Bazil Thredd, and we got our goodie bag. Our mage goes, "Requeue?" To which I have no objections; I figure if Darca keeps misbehaving, we can always boot her.
Unrelated: I wonder if the Alliance are ever confused about why their prison riot started? One minute they're having a prison riot, next thing you know, a bunch of Horde warriors teleport in, smack down all the prisoners, and teleport out.
Also unrelated: I have to give credit to the Defias Convicts, for having the balls to backhand a bear.
We requeue, and huzzah, Stockades! Because the RNG has a horrible sense of humor. Darca immediately pulls; we finish and I say politely, "Darca, please let me pull."
Darca promptly runs into the room to our left, aggros everything in the room, and dies.
Then spirit rezzes outside.
And hearths to Tarren Mill.
So we four-man the rest of Stocks, with me periodically checking if we can boot Darca (I could've sworn they got rid of the minimum time to kick; if it was in the patch notes, it's a lie), and manage to finish before the cooldown because this time we just went straight to Bazil Thredd. Beat him down, requeued, and... Darca picks no role.
Requeue. Darca picks no role. Requeue. Darca picks no role.
Vote to Kick Darca? You can't kick people after the instance is over. What kind of idiocy is that?
So you might be asking, "what's so unique about this story?" Nothing. If I had 50g for every arms or fury warrior wielding sword-and-board and trying to tank an instance when they queued as DPS, I'd have two damned mammoths. Does anyone have any idea why this happens? What is it about this particular class that seems to be attracting all the derp derp derp members of WoW society?