Shunning such a person is human nature and happens in the animal-kingdom aswell. The strong survive and the weak perish or get "banished" from the group.
I am not condoning this behavior btw. I am just stating this cause some people seem very shocked. Why would you be shocked? How were you when you were a kid in class? Were you the bully or the victim? Or did you stand by and let others bully others? WoW is no different, add anonimity and you get the place WoW is.
This behavior has nothing to do with the WoW community. It is human nature. Much like Kenjen (and I said aswell in another thread) - when you have almost no features of control (like rules/laws/punishment/reward) to enforce a certain behavior, you will end up with stuff like this.
Is it good? No ofcourse not. Is it an excuse? No it is not, it is a consequence.
That said, I've seen many people like this "outcast warrior" during my travels in Azeroth. Sometimes I would help them. But people like this (in general) tend to stick to people that helped them. Which is normal/logical. But after I help somebody cause I feel bad for that person, doesn't mean that I want to be their best friend.
So sometimes I just ignored (not /ignore) people requiring help cause I couldn't at that particular time, deal with (in the end) telling the guy I didn't want to be his best buddy.
But yes some people do pull themselves out of the shit they are in with a little help from another player. I've seen and experienced it. That said, most of the time it is that a player sucks because he just can't be arsed checking sites. Regardless what your goal is in this game (be it RP/PvP/PvE), no one likes to suck right or be told he sucks? So if you regularly get told you suck, wouldn't you want to improve (if you were oblivious to that fact yourself)? I am certain that the answer would be yes.
And this guy as I understood it, did in fact tried to improve, yet failed. So yes it is very bad of the community to treat him like they did imo. But then again, how could they know? No one apart from one guy appearantly actually talked to and believed his story. The game is so easy to a lot of people that they cannot believe that some would suck so bad. If you're in 496 gear and do around 30.000 dps, I can understand that the community shunned this person. No one would like to play with such a player unless you actually understood why this was or believed his problems. Everyone (except a few) would assume that he is just a lazy and bad player.
I am sure a lot more people could accept a bad player who actually tried very hard to be better, but couldn't because he had no proper guidance, in a raid/guild/party. Ofcourse there will always be people who just frown upon the bad and treat them all the same way.
I really liked this post. I hope it will open a lot of eyes and hearts. I also hope "the bad/lazy" will not misuse this thread to suddenly be accepted into guilds though.