You don't even have to be using a computer to get hacked these days....

I guess it's better than taking a gun and going postal (shooting your former fellow employees, in case you've been living in a cave), but not by much. Imagine trying to get to work in the morning and finding your car is completely disabled, or else being woken in the middle of the night by your car's horn that you can't shut off unless you remove the vehicle's battery:
Hacker Disables More Than 100 Cars

Just goes to show--don't share your passwords with fellow employees, and for employers, when an employee leaves, then it's time to get your employees to change passwords.. which they should be doing periodically anyway.

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An update to this article... an article on CNET News (Aug.31, 2010) questions whether cars are the next hacking frontier:
http://news.cnet.com/8301-27080_3-20015184-245.html

According to the author, "security experts tell CNET that car hacking is starting to move from the realm of the theoretical to reality, thanks to new wireless technologies and evermore dependence on computers to make cars safer, more energy efficient, and modern"

The article went on to say, "report researchers from the University of Washington and University of California, San Diego, tested how easy it would be to compromise a system by connecting a laptop to the onboard diagnostics port that they then wirelessly controlled via a second laptop in another car. Thus, they were able to remotely lock the brakes and the engine, change the speedometer display, as well as turn on the radio and the heat and honk the horn"

Looks like you may want to be careful if the spouse you want to divorce or the person you just angered is a computer geek. You just never know what may happen to your car if you upset the wrong person. Yikes!