Things I have considered...
Download and print a LoJack manual and leave it on the dash.
It's alternate use is a handy pad of scratch paper .
Wire horn relay thru switch to brake circuit,
A little relay hidden to open the FSS solenoid when the backup lights come on.
Or maybe if I gotta put it in Park to start, tie into that circuit so if I put it out if Park, it kills VSS along with power to the start motor control relay. You can start it, but the moment you shift it out of Park, the engine dies. Looks useful for times I want to leave the engine running without me there for a few minutes
Things I am afraid to do...
Block fuel supply. I understand running the IP dry may ruin it as it relies on fuel for it's lubricant.
Screwing with the vacuum or steering, which causes the thief to lose control and have an accident, which will be blamed on me, the costs incurred could be far greater than my machine is worth.
Wire an old Ford coil to the FSS circuit and run the spark line, raw, between the seat foam and cover on the driver's side.