I'd bet you're safe. If you merged them all to your bnet account and your credit card is being used to pay for all three and you put your name on them, I can't imagine there would be any issue at all. You're probably ok.

That raises an interesting question though. When I was 2-boxing WoW I was playing on my ex's account - which I was paying for. Her name is on it, but it's always been paid for with my credit card. I never bothered to change the info because she never cared much for the game anyway. There's zero chance of her ever playing again, so as far as I'm concerned it's my account. I set it up in the first place. I paid for it. I've played 99% of the time spent on it. But the question is does any of that matter if it still has her name on it?

Just a thought. I don't mean to piggy-back on your thread.

I'm sure you're fine considering you put your name on them.