piano_learner,
I'm not trying to tell YOU anything, I'm speaking generally, and if you don't feel you fall within the picture that I painted of mindlessly irritable non-smokers, then feel free to not associate my description with yourself.
What is this "personal smoke free area" anyway? In restaurants, in Finland at least, there are smoke free areas and smoking areas, although because of dumb air conditioning (concerning the positions of these two areas) and directions of air currents, smoke usually wanders to the non-smokers area. So where can you really put limits to what is "your personal area", if you're outside in public places, unless as I said it is made obvious what you're allowed to do within certain area.
Again, I'm not speaking for YOU, but it sounds like you're easily irritated from the smoke. When I was a kid, I couldn't stand the smoke in restaurants, for the obvious reason that I had a child's young, healthy and pure lungs that I wanted to protect as well as possible from external poisons, and of course because the smoke is disgusting and smells of death. When I grew older, I just learnt not to breathe it if somebody was smoking not too near around, and instead just tolerate it. The annoyance that people get from the smoke is inspired by the opinion of masses that create an internal system of opinion of their own that will give it's participants a feeling of being approved and having the Right Opinion over the objecters, and to change things to their liking without having to adapt themselves to their environment, they label smokers as something dirty and even worthy of directing your hate towards.