I don't think the no smoking rule on balconies is going to fly. Outside smoke drifts away quickly and the smoker can simply deny that they were. There are no cameras on balconies and unless someone takes your picture while you are on your balcony they can never prove that you were. Smoke could have come from any balcony, and if someone did take your picture than those people would be in hot water for violating privacy rights. I can see it now, the smoking police running all over the ship trying to prove a person was smoking on their balcony. Inside the cabin is different, that can and should be enforced.