Some people just believe they have a right to exploit a game for its flaws or mechanics. It's up to the devs to place boundaries so that even the dumbest things can't be taken advantage of, because someone somewhere will find it and use it. PVP in any game is a good example, as well as gold farming. There's just a lot of people that don't feel they have to work for what they get and they don't care who they hurt to get it. Because to them, exploiting is just part of the game. They don't bother with semantics or ethics.