Some pretty sketchy stories. Proximity keys work outside the vehicle to unlock/lock doors. Vehicles won’t start with keys outside vehicle- yes the vehicle can detect if keys are inside or outside the vehicle.
This.
-Ken
Remote start is just exactly that - remote.
Mine works 30+ feet away from inside the house. Outside, it works more than 50+ feet away.
If the engine is running and you leave the vehicle with the fob, lots of warning bells and dash info is displayed. Hard to ignore.