raubt

I believe the warning labels are actually supposed to be kept on regardless of whether the car has an owner or not. They're supposed to warn emergency services people that the car has airbags which may potentially go off while they're pulling you out of there after an accident or whatever (if they haven't gone off already, and the car is damaged and therefore unpredictable.)

I doubt its something that anyone would ever raise a fuss over, but who knows.