Smoke, eat, drink, put their feet on the upholstery, give driving advice, scream ( kids ), play with the radio.
smoke, use wireless devices, fart, use stereo at unrealistic levels
Sit on it.
If you are looking for sane people I believe the answer is 0, I cannot speak to the nature of others
no but there are cars with mirror paint that would blind people in the day time and they wouldnt see you but your car
nope... Pollution is a completely another matter...it doesn't depend on vehicles. People who make cars can produce any car type they wish(and customer wish). Accepting that car is a others' thing.. If it hurts environment so badly,you can refuse the car.
I don't want anything coming out of people in my car.
eat
Crash
smoke
Smoke
smoke in it.
certainly why wouldnt you