There's a way.

While watching my children swim in the pool last Saturday, I felt the smoke in the air around me, and it made me very sick. I looked around, wondering whether this room must have been a smoke-free area. Nobody was both smoking and firing up a cigarette in the room; however, there was a middle-aged man sitting down next to me and he was the one giving off the evil smell. He was just sitting there, but I couldn't even breathe. I needed to move to a more comfortable place.
Does he realize that he gets an offensive odor by smoking? Maybe he doesn't. I think he manages to follow a rule not to make people annoyed by smoke, but it seems to me that his effor isn't enough after his long habit of smoking...