[JonnieCache]

>I'm sure a stealth program that loads onto a car and waits till a date to kill the occupants will be used by someone or a nation-state in the future.

If nation states want that they can do it right now:

http://www.autosec.org/pubs/cars-oakland2010.pdf

http://www.autosec.org/pubs/cars-usenixsec2011.pdf