Dear smoking drivers,
When you are finished smoking your cigarette, please do not throw it out of your window. There may be a cyclist right in the trajectory of its burning ember.
Your friendly nonsmoking cyclist
p.s. You could also be a real pal and refrain from honking a cyclist out of her lane so that you can illegally pull over into said bike lane where you aren't supposed to be, seeing as how you are in a car and all.