I'm willing to bet that most IT security experts aren't talking about used cars when they warn of the dangers of disgruntled former employees.

But it was used car owners -- and the car dealership's reputation -- that suffered when the employee in this case, Omar Ramos-Lopez of Austin, Texas, allegedly hacked into his ex-employer's Web-based vehicle immobilization system and disabled more than 100 cars, or made their horns honk for hours.