Aw jeez. Fine, then every single time you take a step, you are getting slightly shorter. So watch it, you don't want to end up a midget. Marathon runners have been known to shrink percepitbly from running the 23 (I think) kilometers, you should be very careful not to take unnecessary steps. I mean it, its for your own good.
Yes, the crap in cigarettes is more or less poison. However, if you are not constantly exposed to smoke, I mean like every day for a significant period of time, nothing is going to happen to you. Unless of course you have some serious lung condition, then you have a right to complain.
Its like those people who count, and I mean literally count, their calories. So, tuna for breakfast, an organge for lunch, and some salad for dinner...OH NO, I've exceeded my daily calorie budget by 17 whole calories? Oh God, I feel fat already. I'll be socially ostracized! I'll never be able to wear shorts again, if I can even fit in them anymore. I'm so fat! Damn you 17 calories, DAMN YOU TO HELL!!!
**** man, live life. Living with the smoke from my parents, thats probably a year or two off my life right there. But really, who cares. You die when you die, and unless you do whatever the hell you want in the meantime, you might as well be dead right now. I'de hate to be your dad. He's the reason you're alive, and you kick him out of his own house to go smoke outside.

:D
Alright, I'll stop preaching now.