I had the absolute worst luck in LFR last night. I was rotated from my regular raid so I decided to knock out the last half of LFR on the couple toons I wanted a weapon on. The first LFR I ran on my druid went swimmingly, but my polearm of embiggeration did not drop. Sadly I will not become bigger in a vigorous manner for at last another week. That first LFR on my druid the other tank even briefly discussed tanking strategy with me in the form of they let me know what they were doing and I acknowledged I heard them. There really isn't a need for tank communication in LFR, but it's nice when it happens.
My second LFR on my DK I got into a group on the last boss, which I originally thought was good because I only wanted loot off the last boss. There was a small group from Proudmoore in a guild called Hypnotic doing thier best to troll everyone (and they did a pretty good job). The specific players involved were: Riggnaros, Kfchicken, Sylisha, and Porkzqt. Obviously raid geared and knowing what they were doing, but mostly looking to make trouble. They needed on everything; which isn't a surprise, but they even needed on the greens. They bad mouthed everyone, they tried to incite the kicking of people that didn't really deserve it, including myself (it never even went to a vote).
The absolute worst though was when they purposefully wiped us. Three of them went directly to the last platform and DPSed the wing the entire time so that when the rest of the group finally got there we were getting stacks of blistering tentacle debuff before anyone could even kill the big tentacle add. Now anyone else I would assume they just wanted to see what happened, but they blamed just about everyone else and tried to get half the raid kicked. I'm not sure how many attempts they foiled before I got there, but I'd like to think that my calling them out on precisely why we wiped caused them to behave and actually get the boss down the next attempt.
OK I lied, that wasn't the worst part. After I was done with that LFR I was about to log off in disgust when my regular run finished and a bunch of guildies were going to queue for LFR. I decided to go along on my mage who hadn't yet done the first half and I wanted the option to do the second half in the future. Guess what 4 people were in that new group with me? Oh yeah. They were a lot less annoying in that run so far as what they were saying, but they also didn't have as many people feeding the trolls that run. We actually passed a vote to kick one of them, Kfchicken, who made a point of belittling everyone else's contributions each and every fight. That amused me a little.
Still, what I don't understand is why don't people just kick these types of people immediately? Not kicking them just encourages asshat behavior in LFR because they think they can get away with it. Worse than that, other closet asshats might think they can get away with it too and start griefing their next LFR. I think BBB did a much better job elaborating on the evils of encouraging bad behavior by inaction, read his posts here and here on the topic.