Hee-hee-hee! I love this!!
Smokers are always throwing junk out the window, including cigarette butts. They have trays, but they don't use them, because they are generally slobs, and addiction of any kind leads to anti-social behavior: the "I can do anything I want to" attitude.
If these smokers had any couage, they would lay off mere nicotine and get onto some really hard drugs. Then they could destroy their whole families quickly, and commit serious crime, instead of this mere littering. It's a matter of degree: why not go for the big time, cig-suckers?