Cameras mounted inside a vehicle might help in accident investigation, but wouldn't act to deter anything (teens would probably find out how to hack into the system and remove the evidence, anyway).Accident investigations have found that the rate of accidents increases with the number of teens inside the vehicle; perhaps teens should only be allowed to drive boring 2-seat commuter vehicles, such as the old Nash Metropolitan...Alternatively, it might be possible to tone down a family car's performance potential with programmable chips tailored to certain drivers' habits: Junior would enter his biometric ID into a scanner, which would slow the vehicle's acceleration and top speed, yet enhance its braking ability.

Idea here would be for parents to have immediate access to live streaming video so that they could view behavior (# of people in the car, driving, etc.) in real time. Immediate intervention would be possible via cell phone and driving privileges "amended" until appropriate auto behavior is consistently practiced.

Actually the parents could interface a cellphone to the vehicles engine management computer and call up to shut it down (when it was safe to do so) should any illegal or dangerous driving behaviour be detected.

I have to wonder what would stop computer literate teens from subverting the system and playing a video of acceptable behaviour into the web cam output stream while they got up to some dangerous mischief. Would this also stunt your childrens social development as a lot of teens use cars to make out in?