The reason for this behavior is mainly because of a games popularity. I've played quite a few MMO's, from Guild Wars, Warcraft, and on to Lord of The Rings and Phantasy Star Universe, to name a few. GW, LoTRO and PSU have, by far, much more solid and helpful communities than WoW does, and I believe that this is mainly to do with the fact that those games have a much, much smaller community than WoW. The more a game permeates the general public the more immature players its going to get, I'm afraid thats just how it is.