Today, I find myself unable to log into my battle.net-account. After writing a ticket, I was told my battle.net-account was hacked and my mail adress and security question(!) was compromised.
I have taken the necessary steps already and made a new email adress.
I just wanted to share this experience with you. I rephrase:
Even though having connected my account to an authenticator, my account was breached so far that the hacker even got hold of my security question (in my case: best friend in the past).
Your account is not secure, despite what they tell you. I'm done with the game and Blizzard altogether anyway, the last thing to do now is inactivate my bnet-account and disconnect every detail that could lead to hacker to important rl information. The risk is just too high. Bye.