Nearing the end of HW, shortly after Dun Scaith was released, I had healers and DPS starting the pull in Dun Scaith. Some even doing the countdown(no ready check). I normally wouldn't have a problem with it, but when someone is explaining mechanics to the new person, you let that happen. It wasn't even party chat, it was alliance chat.
Yeah, you run into all kinds no matter what server/data center you're on. Some people are really nice and accommodating, others are like my example above.