Anyone wired a self latching or other type of anti-theft kill switch ?

I'm rewiring the whole car the battery and fuse blocks and relays will be in the trunk, under the hood will be very minimal wiring. Was thinking of run two kill switches fuel pump and starter relay hidden in different spots, plus thinking of a way to use some kind solenoid to lock the ratchet shifter in park.

My thought was that if there was anything hot under the hood, it could be used to bypass any kill switch you set up. So, for example, if the alternator wire is hot when the car is turned off (like it is stock), a wire from there to the ballast resistor and a quarter to cross the posts at the starter relay would be enough to start the car. Certainly there are other issues to address before someone could drive the car away, but it is the bigger part (in my mind). And relocating the starter relay would mean reaching down and crossing it at the starter lug, but still do-able.

Had a local guy get his Demon stolen out of his garage and as I recall, the security video he had showed something exactly like the above method.