i read a statement from a GM that said they treat each game account separately on a battle net account. also i've heard of let's say 3 merged wow accounts on 1 bnet, 1 gets banned but all 3 are bot accounts, the rest left alone. i'd assume the same applies to a separate game entirely. more then likely, your offenses in d3 will not give your bnet account some kind of "watch any other gaming accounts this person has" label on it.