I'm always amazed at those who deny the damage caused by smoking, 2nd hand smoke, and even 3rd hand smoke. Unless they see the damage being something like the atomic bombings of the cities of Hiroshima and Nagasaki, then it's not damage.
With regard to your post above...I agree with you...when people say, yeah, I know what the "so-called" dangers are...but then KNOWINGLY expose kids... and use personal freedom and / or rights to justify doing so...then...
Has decades of scientific evidence about smoking been in vain?
Fighting to maintain a right to engage in a behavior that's positively known to inflict harm to self and others is called "addiction". The right for adult individuals to choose to self-destruct is okay by me. But not the right to self-destruct and takes hostages with them. We don't individually live in glass boxes. Our behaviors affect others.