That problem could be self-limiting. Pity about the collateral damage.
How many people have had car accidents as the result of smoking a cigarette? None at all.
Actually, enough that most insurance companies will charge a tobacco user a premium--even on their car insurance (think of dropped 'cherries' and trying to keep your crotch from catching on fire).
A distraction, granted, not as bad as 'texting' or the 95% of idiot drivers I have seen who were on the phone, but one of the first identified.
Sadly, "tobacco user" also covers those of us who use smokeless tobacco, and we aren't going to burn any tender parts with that.
Is someone ELSE getting harmed by a guy spitting tobacco juice in a cup?
No, but that's not the point of these tyrants.
The fact that they DON'T LIKE what you're doing is reason enough.
Harm? Hardly. The most important thing is that you OBEY.