I received this answer from Blizzard, following my request for further details :


Greetings,

Thank you for your e-mail. We regret to inform you that we do not provide evidence of our investigations to our customers. We can, however, confirm that all such cases are thoroughly investigated, and double checked by other members of our staff, in order to ensure fair treatment.

Should you have other questions or concerns, feel free to contact us again, via our webform: http://eu.blizzard.com/support/webform.xml

If you wish to review our current Rules and Policies, they can be found at:
http://www.wow-europe.com/en/policy/

Regards,
Then I will go on using the same software and addons I used until now, at this point I have no reason to believe they were the cause of the ban.