Protip: Nothing is going to stop them from smoking unless something really bad happens to them or they want to stop.
My mom smokes. Not as much as she used to. She usually smokes outside or sits on the back door at night. In the car, she lets the smoke and excess out the window. My dad had stopped smoking and dipping for about 5 years, but he started back dipping a year ago. He is thinking about smoking again.
I have no problem with smokers. They know its probably hurting them, but its a bad habit they picked up.
Smoking is one of the most hardest drugs to quit. My mom has tried to quit many times, yet to still smoke. Smoking calms her down. She can be a real bitch when she is trying to quit. I honestly can't see any affects smoking has had on her. She has dry, cracky skin, but she has always had that.
My Grandpa Jim has a big alcoholic. Its a shame because he can't even golf anymore due to being an alcoholic. My mom has tried to make him quit, but he still drinks. She quit trying to help him because he denies the affects. He lied to my mom about having a heart attack back in 2008, for what reason I don't know why, when he had a triple bypass surgery. He'll probably drink 'til the day he dies.
Its something that they like and you can't do anything about it. Sorry bro.