Well first off all my friend just had his account hacked then the person merged with battlenet.. Stripped his items and change the email and all of that (this was done after a 5 month wow break so it was stolen for 5 months) then he called blizzard, they gave him the account, unlinked the account with battlenet, reset what he had back to the day he last played, gave his money back, and yep... Blizzard has
control over even linked battlenet accounts.. They can see this.. But it's probably fine, the only time they look is if there is a noob GM who thinks multiboxing is illigal and then they check and get so owned... But if they check the accounts.. I dunno that could be bad.. I just made all my accounts in my name!