Blizzard seriously dropped the ball on this one. I just had all four of my accounts get a 72 hr ban with the exact same email after quickly being disconnected from the server shortly after exiting the arena with guild mate around 7:30pm est. I can absolutely 110% guarantee that I have done nothing wrong with my accounts, all information is in my name across all accounts, nobody else uses them, etc etc. The customer support forum is filled with similiar posts, and I called twice on the phone to Blizzard support and they can't do anything for me, except direct me to the email address for wowaccountadmin. Unbelievable...


EDIT***

just got this email:

Code:
 
Greetings, 
Recently your World of Warcraft account received a notice for economy exploitation. Upon further review, however, it appears that this specific action was taken in error. As such, the account action and any access restrictions have been removed. 
Any further questions concerning this account action can be addressed by Account Administration. To learn more about how Account Administration is able to assist you, please visit us at http://www.blizzard.com/support/wowaa/. 
We thank you in advance for your understanding and hope that you will continue to enjoy your gaming experience in World of Warcraft. 
Regards, 
Hacilus 
Account Administration 
Blizzard Entertainment 
www.WorldofWarcraft.com