Many moons ago I came across an anti-theft device for a car that was designed on similar lines. The idea was that car alarms are easily defeated and are general

Many moons ago I came across an anti-theft device for a car that was designed on similar lines. The idea was that car alarms are easily defeated and are generally ignored anyway if they go off. When armed, the circuit would cause the car to run but stall frequently, blow the horn and lights and misbehave in other ways. Eventually the thief would assume the car was in serious disrepair and abandon it.