Oh I know about the oxygen thing! I'm apparently supposed to stay 10 feet away from any open flame, and yet sometimes people will walk right on by me and I worry that my head's going to explode!
I don't care so much if people smoke or not as I think its their choice, but second hand smoke is disgusting and I HATE that. Nobody can smoke in any restaurants or bars here in Vancouver, and now they have to stand at least 50 feet (I think--20 meters here) away from entrances., so that's nice. I'm also lucky enough that nobody I know smokes.