I'm sure you've read before about watching out for all sorts of scams -- after all, your World of Warcraft account information is valuable stuff, and plenty of thieves out there would be happy to get their hands on it. The latest technique of account theft that I've noticed is all over YouTube, in many videos offering to teach you how to hack World of Warcraft accounts for fun and profit. All of these videos suggest that Blizzard has some sort of account retrieval service that can be accessed by e-mailing a random address (often at Gmail or Hotmail) with your account name and password as well as the name of the account you wish to access. Then, the videos claim, all you have to do is wait for Blizzard to mail you the password of the target account!
Of course, the entire thing is a scam. The people posting these videos just want to take your password and run. So be warned, everyone -- don't fall pray to greed, and don't give your password out to anyone, regardless of what they might promise you in return.