First gen rental bikes in Seattle, among them, Uber Jump (very heavily built, fork more like a motorcycle) were seen with rear wheel lock cut, I'm sure GPS disabled, and rattle-can painted, used by homeless folks. I saw an unpainted one halfway down a ravine, called them, it never got picked up, as shortly after they went electric, and the non-electric ones evidently meant nothing to them. Bigger issue in recent years has been bike theft in general. But the e-rental bike and scooter program seems to be very successful. They have frequent servicing for battery and relocation, so I would bet that if GPS suddenly went offline, if they are smart, the system immediately alerts and their field folks are dispatched to the location pronto. I know they are geo-fenced because I'll see a group of them at the "border".