Um, okay, but why make a clone post?
An MMO company CANNOT prove that you own an account using your personal information, because MMO companies (at least in the West) do NOT collect that info when you first create your account. Personal, sensitive information like that does not in any way prove account ownership, nor are online game company employees legally obligated or even contractually obligated to take that information to determine account ownership. The only time such information can actually be used is with transaction issues, and even then it means nothing if you intentionally used a card that's not in your name for innocent reasons (like a family member's, or a gift card).