I've played many MMO's and I can tell you this much: PvP players in those communities are the absolute worst. They can't handle the fact that they may have lost legitimately so they have to complain about an OP class/weapon/etc. Your thinking that these people solely came from games like CoD is completely false because most of the PvP whiners I've seen usually are whining about an MMO. Make no mistake though, the biggest whiners BY FAR are PvP players, from any game.