What makes this combo hack easy as fuck to do when it comes to Blizzard games is the fact that Blizzard does not use case sensitive passwords. In the past my password was "abc1abcabc" on a site such as MMOC while my WoW password would be "aBc1ABCabcABc" if someone got my MMOC password they would then be able to log into my WoW account because Blizzard has some of the worst security ever. I found out about this when I got hacked, after that day I got myself an authenticator but I bet my account wouldnt be compromised if they used case sensitive passwords.