I bought a used car and when I got inside I could instantly tell the previous owner was a smoker. About a week or two later I was cleaning out the glove-compartment and found about a half-dozen cigarette butts in there(along with gum, a broken flashlight, and a Duran Duran CD that I still have).
I admit, I can be a fairly lazy person, but I don't have much tolerance for litterers, especially those who litter with something toxic.
We expect people to pick up dogshit, we should expect them to throw away cigarettes, too.