Unfortunately in the US the amount of mandatory safety features precludes this at scale.
Discussion
In #Australia, from this year its illegal to sell a new car without a remote kill switch entrusted to the government
Mad Max is going to be super boring!
If I'm ever forced to buy a 2025+, rodents are going to chew off the little ECU antenna.
Sad :p
Re Mad Max though, my BIL has an acre of vintage cars in need of modifications. And crossbows :)