An incident today sparked the idea for this thread. I'm a total non smoker for a couple of reasons including the fact that my father is a lung doctor. Anyone riding in my car would know this, thus, everyone who rides in my car is a non smoker as well. Well, today I was going out to my car after school and my friend was like David, can you take me and my sister home (his tire was flat, plus he has 2 15's in his trunk thus, he doesn't keep the spare tire in the car). I said sure, and unlocked the car. I had to run back in school to get my stats book, and when I come back out, his sister is ****ing lighting up a Marlboro in my backseat. I didn't have to say anything except "Out.", but I was furious. I hate the smell of smoke, and now the car smells like smoke. Left her dumb *** standing in the parking lot too. So, to all of you, what's that one thing you hate that your passengers do when they get in your car? A close second for me is touching the glass. Whattabout y'all?