Ok, this isn't breaking news, but a lot of people like to remind every one in earshot of this fact.
I have created a new drinking game. Every time someone mentions the word "Wrath", in a proper noun sense and contrasting it against current content, you take a swig of your favorite beverage. For us beer drinking types, this is going to make PUG groups more tolerable as the night goes on.
PUG groups in heroics are a mess right now. It's a cesspool of arrogance and impatience. I sincerely advise against any heroic instance running where your group isn't the majority. Otherwise, be prepared to be kicked for any reason. I've seen healers drop after one wipe, DPS get kicked for low output or dying for any reason, regardless of how much it was the healer's fault. And be prepared for everyone to have an opinion, all the while very few of them actually having a clue.
Most PUGs in our groups are DPS since we have a great depth of healers and tanks. A PUG DPS needs to wait in queue right now for upwards of 40 minutes unless they have a healer/tank to tag along with. Any PUG who needs on loot they can't use, or is otherwise just out to troll, boot them and send them to the back of the line. Don't reward this behavior. No one should have to tolerate people who aren't capable of being civil. Also, give it back to them so they are as angry as possible while they wait. Eventually, they might learn to bite their tongue and contribute like a normal human being... Yeah, that's too optimistic.