Anti-carjacking device?

Question

Whats a reliable one?

Answer 1

Check out this site, it the perfect anti-carjacking device...................

http://video.google.com/videoplay?docid=...

Update......Try this site..................

http://video.google.com/videoplay?docid=...

Answer 2

S&W 357

Answer 3

Claw hammer down side of seat so if anyone trys to attack you for your car  pick up claw hammer and impale in there face also a life saver if in car crash and doors wont open to smash glass

Answer 4

lo jack

or

certain gps tracking systems

i know mines wired up so that the engine will die after 15 minutes if the car is hotwired

and

i have a time delayed kill switch installed too