The thing is if you single box (solo), the chances that you get caught is slim to none. You probably have to tell everyone in the trade channel that you are using someone's account and probably have to report yourself. The reason is that 1 toon does not draw attention to itself. I AM NOT saying that if you solo then account share all you want, just saying that you probably will not get caught. Blizzard doesn't look at everyone. They only look at stuff that do not look right or things that people report. Now then they see/hear that 1 toon is walking and 4 other toons are following them, they will look into it. If a lot of people complain about it they will take a look at the account names. If the account names do not match up, all the toons are doing the same thing, and coming from the same ip address, blizzard will band those accounts for account sharing.