Some of the devices disable the ignition.
Which is very dangerous as many people are not used to controlling a vehicle that has stalled. Much was made in the news about GM's ignition switch problem, but the actually cause of death in nearly every case was the driver didn't have the strength to move the wheel without power steering, or once they encountered the extreme stiffness, they panicked.
With the small diameter wheel and no gearbox for mechanical advantage, it's quite a challenge to drive. When I lived down in Groton I had an electrician neighbor who was a big drinker and one day he needed someone to drive him up to the rental store to return a piece of rented equipment. He was too drunk to drive and I was one of the few people he knew that drove stick and could steer his old Ranger truck without Power Steering. And damn, it was pretty difficult though doable.