Maybe it's just me, but I think smokers are some of the most careless, thoughtless people with whom we share this planet!
As you drive down the street or highway it is not uncommon to see a lit cigarette butt carelessly thrown out a car window. Walking into almost any place of business, pause for a second and look at all of the cigarette butts cluttering the sidewalk and grass. At times I have seen piles of cigarette butts littering the parking lot where someone decided to empty out their ashtray.
I doubt if this letter will change anyone's behavior. Those who have come to believe that the entire Earth is their personal ashtray or garbage can will continue to carelessly flip their lit cigarette and empty beer and soda cans, along with their fast food bags and wrappers, out of their car windows.
Butt (pun intended), maybe it's just me.