Nope, your more likely to get banned by being reported (like if your bot's stuck but "running" in place, and someone sees... or farming in the same area all the time, etc.
I guess my reasoning for asking is if I have 3 accounts linked battle.net, would they ban all three accounts if there were suspicious activity on only 1. All hypothetical obviously! =)
Ok that is reassuring. What do they thnk about interaction. If you pass gold (nominal amounts around 3-5k) to other accounts do they ban those as well?