Never Share Your Password

More than 100 drivers in Austin, Texas found their cars disabled or the horns honking out of control, after an intruder ran amok in a web-based vehicle-immobilization system normally used to get the attention of consumers delinquent in their auto payments.

Read More http://www.wired.com/threatlevel/2010/03/hacker-bricks-cars/#ixzz0iXEHL7mX

Although the article and it's author are emphasizing the use of "hacking" in order to set the car alarms and horns off. I think the main point of the article should be never share your password. Even though the accused supposedly hacked the system he didn't really do anything but use another co-workers username and password. This is a basic social engineering hack where one user gains access to another users credentials and uses them in a fraudulent manner. This could have been avoided if the co-worker never shared his password. I stress this to everyone I help and work with.