Why do smokers have to litter?

Why is it that no matter where you go, smokers feel it is their right to toss lit cigarette butts? I'm driving along the highway and a lit cigarette comes flying right at my windowshield, sparks flying and everything.

Of course, this IS against the law, but that never stops smokers. Nor does it stop them from flicking cigarette butts on the ground outside office buildings, stores, restaurants, or anywhere else they may be smoking and have to put it out.

I'm tired of this crap and, quite frankly, will have no problem letting smokers know this if I see it happen again!