I dont know how you can prevent this.....
 

But listen here :). I went to get my windows tinted the other day, and they did a great job. I got 35% all around which is legal in just the back windows, but the front is a tad too dark. So i figured i can roll down the windows when i see troubles!! But i noticed a few days afterwards that there were some cruddy black marks all over the top portion of the ceiling in the car. Im a little pissed cause i think it's the tinter's little dirty dome peice (his dirty hair rubbing all over the top of it). And after a few moments of cleaning the ceiling w/ shoe cleaner, im still stuck w/ a crappy light but noticeable black spot :(.

Make him pay for it. If not, then kick his buttocks!

His hair left a stain?? Now that's gross...I'd complain, but i doubt it will accomplish anything. Chances are, he'll deny it.

Yeah, im guessing how he worked in the backseat trying to fit the film in, all the grease and dirt on his head rubbing the ceiling eventually left a stain.

You guys at least be careful, take a picture before hand for proof. Because whoever will be working on ur car for tint, will have to squeeze in the backseat. So try to not sound like a bad person or jsut do whatever it takes to keep that top clean :P. But that fabric im guessing can be stained easily :)

why cant people leave our cars alone!!! someone cut my driver seat with a knife, and i only drive it, but yet all my friends get in it all the time. im pissed off to. And i was afraid someone was gonna key it, not knife the dam* seat

Sounds like you've got some great friends.

I had some crap done to my interior bcuz of ppl who ride in it. It's an everyday thing but my center console the aluminum part is scratched up cause the passenger will ding it w/ the seat belt....ohwell not to sound SO UPTIGHT, but it's my car :(