Son banned for spamming/advertising?

Sadly, it appears as if your son's account has been accessed by an unauthorized party and used to spam players. I strongly encourage you to scan each computer used to access the account for malicious software, and you may also want to speak with your son about the dangers of phishing scams. For helpful information, I encourage you to review the following threads:

Account and Computer Security:
http://us.blizzard.com/support/article/30794

How to Identify Fake or Phishing Emails:
http://us.blizzard.com/support/article/25133

Fake E-mails from "Blizzard Entertainment":
http://forums.worldofwarcraft.com/thread.html?topicId=965511383&sid=1

To recover the account, please contact our Account Administration Department by sending an e-mail to [email protected] from the account's registered e-mail address. They will gladly look into this on your son's behalf and overturn any actions taken while the malicious party was in control of the account. If any items, gold, or characters were affected, please review the following thread for more information on the recovery and restoration processes:

What to do if Your Account Has Been Compromised
http://us.blizzard.com/support/article/30796

Please let me know if you have any questions.

Q u o t e:
Thanks for the information Aredek. I responded to the ban message last night, how long do you think it will take them to get back to me?

Possibly another day or two, but I cannot say for absolute certain. Nevertheless, they'll do what they can to respond as soon as possible.