First off -- this didn't come to my primary e-mail address. Blizzard doesn't know me as "firstname.lastname@example.org" so any mail going there has to be bogus. And secondly, it's coming from Blizzard Europe, while I don't have a European account. However, if this had landed in my primary mailbox, and substituted US contact information for EU contact information, I'd have to take it seriously -- after all, it appears to have been sent from blizzard.com and it sounds awfully ominous. They suspect me of trying to sell my account and they're going to suspend it unless I verify it! Yikes!
However, here's the big catch: after going through all of their ominous threats, they tell me to give them my account name and password. Nope, sorry. A Blizzard representative will never ask for your account name and password -- so don't give it out to anyone claiming to be with Blizzard, because that's all the information they need to take over your account. And if you get a mail like this that you're just not sure about -- don't give them any information, but confirm its authenticity with Blizzard, first. Get in touch with their billing support team by phone or e-mail!
For those of you curious as to what one of these scams looks like, the full text of the e-mail is after the jump.