Well... heres what I have to say... I have lived in a smoking house all my life and of course I still do... although it may not bug me as much now as it did in the past when I was younger I had breathing problems, which may or may not have been attributed to the 2nd hand smoke but the smoke sure didn't help. As for in the car, if you are under the age of smoking you shouldnt be allowed to inhale the smoke in a car or in a house, and as for parents I am not telling you you're right or wrong but from my point of view, If your gonna smoke keep it out of your kids lungs they have enough to deal with anyway and they don't need the extra junk in their lungs.