My WoW account was hacked after I put the authenticator on my brother's account. I then put it back on mine after wards but the hacker left a free month. Anyways Blizz didn't remove the month so I played, and they now locked my account a few weeks later saying I need to send them $15 in the mail. Is it safe to take the authenticator off to use for my brother's because I only use my Bnet account for SC2. Is this alright? (Plus it is a hassle)