Both my parents smoked and being locked in a car with them puffing away and gagging on the smell was enough, also the ashtrays full of butts.
I keep hearing an advert on the local radio telling us that a lot of house fires are caused by people not putting cigarettes out properly. My Mum proved this by having a fag first thing in the morning and going to work. It was the school holidays so we were left in bed, luckily I woke up to find our house on fire.
We used to hide her cigarettes, beg her to stop. She used to wake up every morning and light a fag before she even got out of bed. She finally gave up after probably 45 years of smoking.
It was tragically too late, she died a harrowing death from lung cancer 2 years ago. 2 rounds of chemo, all her hair fell out, she had secondary cancer in her brain. She decided at that point why bother not smoking when it was clear she was going to die. I had to wheel her outside the cancer hospital with the rest of the smokers for her fix.
Her actual death was horrific to watch, in fact my Dad couldn't, luckily she was unconscious when he broke down. He has since quit smoking.
If either of my two ever smoke, I will stop all their pocket money. Fortunately the secondary school works on a card system to pay for school dinners.
I will talk to them, nothing dramatic that will make smoking more appealing, but I would worry that they are doing it to fit in so I would be trying to find out who is influencing them and where the hell they were buying them from.