In G.M. vehicles in the '50s you could shut the vehicle off and remove the key but unless you put it in the locked position you could still turn the switch and start the vehicle. At the time I thought it was kind of idiotic!
Quote:Leaving parked vehicle
191 (1) A motor vehicle must be equipped with a lock or other device to prevent the unauthorized use of the motor vehicle.
(2) A driver must not permit a motor vehicle to stand unattended or parked unless the driver has
(a) locked it or made it secure in a manner that prevents its unauthorized use, and
(b) if the motor vehicle is standing on a grade, turned the front wheels of the vehicle to the curb or side of the highway.