From personal experience I can tell you they could not give a crap if it's the same account, not the same account, the same account different person, the same account same person but with a beard, the same account with a different character name but female this time, different account but played from the moon, different account with the same name and same address, different account same name and same address and same phone#, different account different name different phone# different payment information, different account different name different address different phone# different payment information different IP different DNA and also now driving a different car with a new GF. When you're caught you are caught and when you aren't you aren't. Doesn't matter if you have 2 other banned accounts under the same battlenet. If you are botting and you get caught it's done and for all we know it does NOT increase or decrease the chance of detection.Anyone that tells you anything different is simply speculating and frankly full of crap. I've tried it all... All of it... Every method you can think of I've tried. I've tried VPNs, virtual PCs, different PCs, different PCs with different MAC addresses. When you get caught they will ban you. Period.
I've personally been running one of my account for about a year now, that has 2 other banned licenses under it and that account is still fine.