> To prevent it from being towed, I have always liked the valve in the brake
> line trick.  Apply the brake very hard, then the valve closes locking the
> brakes on.  Can't tow it if it doesn't roll.

Bet me.  One of the guys who works for me was once a repo man.  They often
had to pull cars out of parking spaces that were backed in with the
parking brake set...  just hook it up and pull slowly, the tires will
slide, then winch it onto the flatbed.  That or jack it up and throw a
dolly under it.  Either way, if the thieves have a flatbed and some time
they WILL get the car.

Of course you could build in a nice little ADXL202 tilt sensor...  if the
tilt angle of the car changes significantly while it's not unlocked, raise
hell with the horn & lights to wake up the neighbors!  So much better than
a vibration sensor that will wake you up every time there's a
thunderstorm.

Dale

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