This is kind of retarded and a persons vehicle is their property/personal space. But the part of me that agrees with it is because I feel it's distracting much like talking on a cell phone while driving, but it seems the motives behind this bill are not that.
I grew up with my dad who smoked 5 packs of cigs a day (and he still does) for 18 years of my life. I have zero health problems, so I don't see how someone in a car with a person who smokes one or two cigs is going to instantly give them cancer and boil their insides out of their eye sockets.
Smoking is stupid, and the ban should be for the same reason as why the cell phone ban was put in place, not to protect the innocent children.