It's not always enforced, you should know best.
World of Warcraft has no balance, if you think making balance is good then you are a stupid troll. There are a lot of player versus player suggestions in 2238, ignore them, there are players that can come in forum and donate, let us just focus on players who do quests so you don't have to work on some things, but so you have to make more "unlimited" quests to satisfy the existing population ( books will give unlimited quests ), is that hard to "copy paste" quests? There is no balance in single player games and if you kill all bots then the same principle applies to players.By developers for developers.
Doctor: This is a banana, it is yellow and it is food (doctor shows the banana)Ore Obtainer: Bullshit, it is an apple and a single player game.Doctor: (the man becomes quite speechless, takes off glasses, leaves everything and goes out of the cabinet without saying a word, while going out he is passing by his secretary saying) Next patient.