I remember reading a thread here a couple months ago that seemed pretty compelling in favour of someone inside Blizzard possibly hacking into accounts.
Here's what I can tell you:
1) I absolutely do not have a keylogger. I do not have an account authenticator. I have never ever shared my account with anyone, nor even given anyone access or the password. I can guarentee all of those things.
2) I have run both virus and malware scans, both of which resulted in 0 problems. I always use Firefox with both adblock and noscript, and have since my last reformat six-ish months ago. I have not downloaded anything other than porn vids and pics over the few days. (I'm sure someone will come here and say I've missed something, but I'm quite careful about what gets on to my computer.)
3) My password was pretty strong, letters and numbers, and longer. I have not had any problems with any other accounts I log in to (email, facebook, etc.) I did change my email password to a much stronger one just to be sure.
4) My account was cancelled less than 2 weeks ago. I recently went to confirm that cancellation 3 days ago. My access is set to expire on the 20th. I haven't logged in since 2 nights ago, when I played only for a short time before logging out again. None of my characters had a guild, if that's relevent.
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I find I actually don't care much that my level 85 protadin was deleted upon regaining access. My 80 mage was stripped naked too. Surely they can restore my account to a point before 3 days ago. But I'm really not sure how it is that my account was accessed outside of a straight brute force on my password/account.
I don't actually believe that someone at Blizzard is responsible, but having eliminated pretty much every other potential avenue (again, outside of a random brute force hack) I can't really see how someone got in.
You can also just spare me the authenticator lecture. I don't actually care about my stuffz enough to go out and get one of these things. I keep my computer secure enough that I feel safe without one.
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We have not inherited the Earth from our parents, we have borrowed it from our children.





e'know, com'on! Giimmeee di Ke$$$HHHHHH!"

