I wonder how they'll even track gas vs EV miles on plugin hybrids. I guess it's also tied into the OBD2 system and is checking? What happens if I block the gps

I wonder how they'll even track gas vs EV miles on plugin hybrids. I guess it's also tied into the OBD2 system and is checking? What happens if I block the gps signal? Is my car bricked? Updates later? What if I spoof it to think it's never moving. Or never using EV mode. Crazy.