Gaming and Griefers
One could take a hardline position, as often argued by many griefers, that what happens in game environments stays in game environments. A griefer is a player who harasses or deliberately provokes other players by irritating or angering them. From this position, killing a non-player character (NPC), or even another player’s avatar in a massively multi-user game environment, such as World of Warcarft { } cannot be immoral, because it is only happening in a “game environment.”
Religious prohibition against killing