I know a guy that fitted a fuel cut off solenoid, like the ones in a diesel injection pump. He put a switch under the floor to turn it on and off. I asked him how he turned it on/off without people noticing. His answer was 'I drop my keys if there is anyone around'.
I thought it was a good idea until someone stole his car. He heard his alarm going off, as he got outside, the scumbag was reversing out of the drive. The prick waved and laughed as he drove up the street. My mate ran after his car with his golf club, he didn't make 100yrds until the car cut out. Needless to say his got his car back. The unfortunate thing was, he also got arrested and charged for GBH.
It all ended sweet though as the charges were dropped.
