Teenagers wreck cars. That's a straight-up fact. Ask any insurance agent. Not even bloody demonstrations featuring the local EMS and a donated car from the wrecking yard can convince teenagers not to drive like idiots. But you know what can? A nanny system like Ford's MyKey that limits the car's top speed, limits the stereo's top volume, blocks cell phone signals and requires the seatbelt to be clicked in before the radio can be turned on. It'll even send parents notifications if the car goes above a certain speed via an app.