I am a firm believer that if you don't have anything nice to say, don't say anything at all. While I understand that my response to the hunter's departure from the dungeon was a bit excessive, the ability of the hunters that I am paired with in dungeons is very frustrating. I played a hunter for the entirety of Cataclysm and raided on a weekly basis through T11, T12 and T13. While this is irrelevant to what I'm posting, I do know the ins and outs of the class which makes it significantly more frustrating knowing how simple it is the correct the mistakes that most hunters make in dungeons; the most common of which being pet taunts and the absence of Misdirection on larger pulls.
The healer's response to his pet holding aggro over my threat was what aggravated me the most seeing as how the mobs in that hallway split and Shadowstep to players in the group. It doesn't matter if I have threat; they're going to jump to someone and someone's going to take damage.
Contrary to what he said, I'm not a dick to everyone. Everyone gets frustrated and I'm pretty sure that I'm not the only person who snaps every now again. Here's a crudely drawn kitten that I made in Photoshop. Happy Holidays!