Talking on phones/texting/reading books/applying make-up
wacko
is dangerous while driving. Eating and drining (providing there's no fiddly packaging that requires both hands), listening to music and smoking are fine.
When I was driving between 400 and 1000 miles a week to look after my Mum when she had cancer (200 miles away from where I was living and studying) as well as finish my University degree, I was often driving overnight or very early in the morning after little sleep and was exhausted both emotionally and because I was up to my eyes in University work, and had to get it done before lectures. Driving with no music just creates a white noise, which sends people to sleep and was dangerous, so I had the music up loud and sang. I ate in the car as I had no other time to eat inbetween lectures, hospital trips, and sleeping. Smoking kept me awake as nicotine is a stimulant, and the opening of the window also helped, as did teh action of doing something other than keeping both hands on the sterring wheel "at 10 and 2". If I stopped every time I felt hungry or like I needed something to keep me going, I'd have spent most of my degree and my Mums treatment sleeping in service stations rather than getting what I needed to done.
Although if I ever was dangerously tired, I would pull over and sleep. I'm not a martyr and wouldn't put other people's lives in danger. If my cigarettes or CD had fallen on the floor, or the radio wasn't working, I would wait until I had pulled over to fix it. Fiddly food packaging was a no-no, I'd just have to pull over and open it before setting off again. Cigarette was always out of the window so there was no risk of dropping it in my lap.
I guess if there's a group of us in a car we should just sit in silence.. Talking is a distraction, is it not?
Anyway, this is going off-topic. This is about smoking in cars around children, not listening to music or eating. Start a new thread for that maybe?