I haven't heard of this. Since there is no fuel pump in 1996-2003 North american cars, the fuel shutoff solenoid on the injection pump would be the best choice.
You could attach a switch to that and splice it into the IP solenoid wire. I wouldn't however. It should be pretty reliable because it's so simple, but I don't like fooling with kill switches personally. I will look at some wiring diagrams to see if there's a fuse or something else that might be easier.
The obvious choice for placement is under the dash, but I've also seen kill switches in the air vents, under the seat, in the center console/cigarette lighter. It's a bit more wiring, but in the overhead lighting console is a possibility.
Edit: I would think you could also cut into the immobilizer wire going from the ignition switch to the immobilizer. There's a pickup in the ignition switch, trace the line and splice the switch between the ignition switch and immobilizer. Disabling it will activate the immobilzer so the car shuts off after 2 seconds. This is safer than fooling with the injection pump or fuel system since if it's accidentlly activated while you're driving, it won't cause an emergency situation - it'll only prevent starting the car.
You could attach a switch to that and splice it into the IP solenoid wire. I wouldn't however. It should be pretty reliable because it's so simple, but I don't like fooling with kill switches personally. I will look at some wiring diagrams to see if there's a fuse or something else that might be easier.
The obvious choice for placement is under the dash, but I've also seen kill switches in the air vents, under the seat, in the center console/cigarette lighter. It's a bit more wiring, but in the overhead lighting console is a possibility.
Edit: I would think you could also cut into the immobilizer wire going from the ignition switch to the immobilizer. There's a pickup in the ignition switch, trace the line and splice the switch between the ignition switch and immobilizer. Disabling it will activate the immobilzer so the car shuts off after 2 seconds. This is safer than fooling with the injection pump or fuel system since if it's accidentlly activated while you're driving, it won't cause an emergency situation - it'll only prevent starting the car.