Question: how come that players can get banned for things like racism and exploiting, yet someone that does not let others finish quests and level up get away with it? If I am to put it in a context, if someone does ninja loot, that person keeps the others away from progressing in the game (by the means of getting an item that is for another) - same thing with players killing others out of fun or trolling or whatever: you keep someone away from progressing in the game (not to mention the fact that many of the players are here for the PvE; PvP can be done very good in BG, Wintergrasp or Arena)

