My parents smoke, my wifes parents smoke. My kids know that it is bad and they express concern for gma and gpas health. My wife nor I smoke and because of the way we have raised our children, I'm 99.99% sure none of the 4 will pick up a cigarette. My kids won't get in a car without putting on their seatbelt even when I don't.
My point is that we as parents set the standards that our children need to adhere to. When we walk through a crowd outside of school smoking, my kids arent blind, they see it. Does it make them want to light up? No. If they see someone with a dip in does that make them want to try it? No. I'm not saying that its ok to break the rules, I'm just saying that if you are parenting your kids properly alot of that stuff is not a factor.
This thread is getting ridiculously long. Like others before me have said, if your gonna eject the chewers, you gotta start ejecting everyone, no matter how small the infraction. I agree with my3sons and Beeson, put this thread to rest.