You might be driving in a car right now with a black box recorder, like the black boxes airplanes have. Congress could make every car have one of these in the next couple of years. They typically record events related to actual collisions, things like how long you pressed the brake before the accident and if you were wearing a seatbelt -- but there's not much clarity about how and when and who can see the data they collect. Should my car be able to tell on me for driving too fast?