I very rarely use LFR, but most of the time I did, it was because I was either on an alt, and wanted to gear them up as quickly as possible, or because I needed valor points for the week. In almost every LFR I've been in, it had some of the worst, most toxic environments I've seen in wow. Most of the time, people would be doing very little to help complete the run, but if you call them out, you risk getting kicked from the group yourself, because of the pack mentality lol. Even if you try to be nice about it. Most of the time people just ignore any advice you try to give them on the boss though. Beyond that, the runs are actually boring, it seems some people keep themselves entertained by either trolling, or trying to find ways to wipe the group. The weird part is, when you aren't wiping, the bosses mechanics seem like a joke usually. On some of them, it seems like it's almost impossible to die, which doesn't feel very rewarding when you do win gear. Again, I don't do LFR very often, but sometimes your stuck lol.