I've been playing World of Warcraft since release. I've always been careful of my account. I don't visit dodgy sites.
I however have been hacked. Yes, it was my own fault. My own dumb fault. The most scary part was the "hacker" bypassing my Mobile Authenticator. Ouch! However, instead of complaining about it, I'd like to take this opportunity to warn people not to make the same mistake as I did.
I fell victim to a trojan-type keylogger. I contacted Blizzard immediately, and got lucky with the support tech on the other line. She was quite a genious about this. She looked into my account, did some in-depth checking and concluded that I was caught by a trojan spread to people through various means. The way I got this was by being exploited through an old version of Java and/or Adobe Reader.
I installed a few anti-virus/malware/spyware programs and found 4 traces of Trojans on my pc. I regret to inform you that I can't remember what the name was of the trojan, but I did my research on it. It spreads through outdated java/adobe reader, and is dangerous on a severe level.
Long story short: This would never have happened if I updated my Java and/or Adobe Reader. Hackers are known to exploit certain vulnerabitilies within these applications. I never thought it'd happen to me, but it did.
Thanks to Blizzard's fast responsivity (is that even a word?) though, I was able to secure my account. I got rid of the trojan, and am back in action.
Again, I'm not trying to complain. Being hacked is NEVER Blizzard's fault (except for extreme rare occassions, but you'd more likely get hit by a meteorite than to get hacked because of Blizzard).