Or if I'm eating a meal in a restaurant and you spark up next to me, I have a problem with it. Mainly just because it's unpleasant and makes me stink.
Then don't eat at that resteraunt... go to a resteraunt that does't allow smoking. There is no reason to bring Big Brother into the equation. Let adults choose for themselves, and partents for their kids, and live and let live. A totalitarian society is a big price to pay because you find cigarette smoke "unpleasant".