"Rights"
Well let's defend my right to choke the living s--t out of them in self-defense?
Seriously, as a former smoker, I really don't care if people smoke or not. And, I've gone from where I tried to sit along side of them to where the smoke really bothers me.
It's a bit like having a boom box placed next to your ear. You can't avoid it, may not be able to get away from it, have problems thinking of anything else.
I think people can have earphones, or chew tobacco, to their hearts content, and that way everyone can have their share of privacy.
Arf