During Lich King WoW used to require all the stuff that SE required. But somewhere between Lich and Warlords they changed policies. Friend had an iphone with authentication app. Phone died and apple store kept it for recycling. So he couldn't access his account, so he quit. But when he decided to try to come back all they wanted was credit card number billing address and email. Amusingly that is all you needed for 11 as well.