Originally Posted by Morbus 
Most likely your own security incompetence. Being phished is YOUR responsibility, not Blizzard's. You just have to have a clue about what the internet is.
No, seriously. If you're phished, it's your own damned fault for not giving a damn to learn about the internet.
I've never opened a phishing email, so that had nothing to do with it. I do, however, receive at least 2-3 of them EVERY freakin' day.