Why bother getting all up in Data's case? Some people aren't good and don't care to be good at video games.
I play with shittastic players in L4D pubs all the time. There's a fuckton of them everywhere. If he doesnt' care to be competent, and just enjoys chilling with cool peeps, then let him be. There's a difference between good players and top guild players. It's the same with any game.
There were top tier teams in Tribes, middle tier, and shitty teams. Data is probably a middle tier player on a shitty team. WoW doesn't exactly make it easy to be best in everything. It's boring as shit once you complete the content. I didn't care to raid 5-10 more possible times to get a Last Laugh, for example.