Watch Your Butt

While participating in my usual commute this morning, I noticed someone haphazardly flicking their cigarette butt out the window.  This was not the first time I have seen this action, but for some reason this time struck a chord with me.  Why is throwing a cigarette out the window acceptable while throwing any other trash out your car window is verboten?  Take the time to look down at any intersection and you'll notice a collection of cigarette butts.  People are littering these things all the time!  I do not consider myself a "tree hugger" or even all that "green", although I recycle a little bit.  But throwing personal trash out of a car window is totally irresponsible, not to mention the act of smoking in the first place.