I must be one of the few people who really don't care ...
I haven't known any different then my parents smoking for as long as I can remember, so me, my brother and sister grew up with it.
Luckely for the 3 of us, we don't smoke ourselves.
And my sister is pretty nasty about it too, whenever my mom smokes my sister will give my mom remarks.
2 of my ex-boyfriends smoked, didn't care about that eather, if they wanna mess up their insides, by all means, do so

I did try it once though, when I was like 7 or so, my brother and my nephew dared me, and I won

haha
Never touched one again.
I do agree on not smoking inside public places.
When I'm outside (like at Disneyland, hehe) I really don't care, I would ask however to use the trashcans to throw the bits in, and not just dump them on the floor -_-