wrt PsyOp, I would have agreed with you until my car was recently stolen with an airtag and a custom camera system. The theives could care less about the custom cameras and simply snipped the cables. They had an iphone and I'm guessing once the iphone got pinged they were tracked they tossed the airtag. It doesn't seem like they care all that much about anything to be honest.

A hidden kill switch is probably the best idea since you actually need to find it which costs time.

fun fact, when I told the cops there was an air tag in there their first reaction was "what's that", and their second was "our investigators tell us it's not accurate enough to be actionable information." I recovered it myself and in some sense they were right, the airtag was kind of useless in finally recovering the vehicle.