With your use of swear words and capital letters, it's not unreasonable for one to question the rationality of your statements, however, for the benefit of other readers I will say a little more on this.
Even if one were to ignore the difficulty of an employee dealing with all the internal measures against them doing such a thing, there isn't a good enough financial incentive for them to risk a job doing it. No support is outsourced, and as a first world employee, the amount of money they could get from this doesn't even remotely justify the risk to their job. Gold selling in WoW is very low margins making it only worthwhile to third world citizens.
When I left, there were no notification emails for an account being reactivated, as such, unless a friend questions you through other means about being online, you would not be aware your account was activated. Gold sellers use phishing sites, malware and engage an array of other criminal behaviour to hack accounts, as such they are not fussed to use fraudulent credit card details to add game time or even make use of any other scheme they can to get game time on an inactive account.
An experience of a small group of friends does not make a global pattern, wow has millions of players, there is a staggering amount of coincidence as a result. Also, if you and a friend visit some common website which had their password database hacked, then that could very well explain why both of you got hacked around the same time.
Generally, only big companies which have personal details or credit card data actually notify their users of security breaches, a little fan site which only has your email address and password might not even know they got owned, never mind actually tell their users if they found out.
Compromised accounts are nothing but bad news for Blizzard who loses customers, and thus revenue, as a result of them. It is worth it for them to do everything they can to prevent compromises, they have a serious financial motivation for doing so. It doesn't pay Blizzard to be ignorant on their security, it would cost them way more in terms of lost revenue than spending the money to be doing everything they can to keep their side secure.
With the above in mind, what is more likely, there was a failure with Blizzard, or that your username and password combination was unfortunately leaked into the into the hands of hackers.
No one is infallible, not me, not Blizzard and not *you*. However, once one considers how much compromised accounts cost Blizzard, then the only options become that either there really is a somewhat irrational conspiracy and Blizzard is to blame for your compromise, or the more reasonable explanation is that the compromise was completely external of Blizzard.