Cars as a public space

Driving a car is surprisingly private. Because you concentrate on the road, and because you're insulated from both the road and the inhabitants of other cars, you're letting yourself go a little bit more than, say, if you're taking the metro back from work. Really good way to peek into someone's life - legally. Assumptions of privacy are out the window - you're still on the street, so photography is fair game (plus, getting a dude in another car snapping your mug shot is probably a lot less unpleasant than a red light camera doing it). However, people do tend to be a lot more private in their cars, and thus, a lot more interesting.