Couple things here.
Keith, it's unbelievably clear that everyone in this thread would be happier if you tried to microwave your next batch of hot pockets in the bath tub. This guy is asking for advice on his girlfriend's situation and you end up talking about your less-than-reliable baby momma. You may not drink or take drugs willingly, but there has GOT to be some LSD in whatever well you get water from.
Balian, the series of events leading up to you finding a cig burn on your front bumper from someone in front of you throwing one out the window would have to go something like this:
1. Your front bumper would have to be in their tailpipe. Cigs don't float through the air seeking whatever freshly dried dealership paint they can find, they hit the ground FAST.
2. You'd have to know the exact spot the cig hit your car, which would require captain planetesque superpowers.
3. The cherry or the cig would have to hit your car pretty much dead on which, given that the circumstances in this particular debate have that cig traveling at a high rate of speed and being buffeted by both high winds and something called gravity, are highly unlikely to occur enough to give you the ability to post "burn marks", plural.
4. Right after your car gets hit, you would have to pull over to the side of the road to confirm factually that the errant cig was the object that caused whatever incredibly serious trauma to your automobile.
So, in closing, you're full of shit too.
This concludes a required weekly test. You will now be returned to your regularly scheduled programming, aka "Dumb Hilljack Motherfuckers Making Shit up on the Internet." Have a nice day.