I’ve read and reread this comment and I still don’t understand what you are suggesting.
It does not seem like a very practical idea, no.
A practical non-social solution would be like triggering a timer when the door is locked from the inside. If it is not re-triggered in three days the timer sounds a fire alarm, or something.
Sometimes I wonder if the whole generation that experienced how bad Windows could be has a healthy dose of skepticism for technology. Younger people that have had phones that are much more reliable (and locked down) seem to be the ones I can imagine sleeping in a Tesla with the FSD on.
But the ventilation required to live in it would mess up energy efficiency and cutting out the air on timer seems a bit risky.