Personally, I have been a lot of dungeons where people come into a dungeon who is new and they say that they want to "go in blind because it is better that way." I let them have their way. My philosophy is that if someone screws up in a dungeon, I offer advice after the first wipe. If people are being rude I just leave immediately without a word. When I play tank, I get a lot of dps who are rude and then some healers are even more rude and then some tanks (8-man trials) are beyond rude and outright pathetic (my opinion). I just leave immediately and eat the penalty. My advice is not to take this game seriously. I learned the hard way that this game is filled with people (not all and just my opinion) who throve on being sarcastic, negative, and unhelpful.