In the good old days, we would take the rotor arm out of the distributer.
I think all cars have immobilisers these days, but to be on the safe side, drain all the fuel out of the tank and get a steering wheel lock.
If you did fit a GPS thingy and saw, from your distant home, that the car had moved, what would you do.
A bit like the folks who go on holiday and have their front door camera viewable on their phone.