I think that smoking in restaurants should be banned because when people go out to eat they do not want to be breathing in the smoke or having it all in your food. Also breathing in smoke is bad for your lungs and that can lead to lung cancer. Lung cancer can be a deathly thing. If your favorite restaurant allowed smoking and every time you go in there you breath it in your lungs will turn all black. It makes it hard for the lungs to server there purpose if they are ruined from breathing in all the smoke
Smoking shouldn't be banned in restaurants because it is the persons choice if they want to get black lungs and the restaurants can make separate rooms for smokers in a restaurant. Also, the restaurant can have heavy ventilation meaning the entire restaurant can be completely aired out as smokers smoke.