Snabark:
An answer to the question may
Get people killed.
Why would anyone want to do that? Go get to a level where you can do these things without asking basic questions and then take other people's lives into your hands. Just don't do it around me. You ever crash into me and I find out you modified your car with an Arduino without knowing what you were doing and it will be the end of you. I will own everything you've ever had.
At least try it out on an RC car or something first. Don't get people killed because you don't understand your own limitations.