Banning either is silly. Locks on things in the physical world can only be a deterrent because physical objects are subject to much easier brute force attacks than a problem in the digital world is. If you forced automakers to make their digital keys more secure, it wouldn't improve security, because you could still winch the whole car on to a rental trailer in 30 seconds.

The Kia Boys notwithstanding, basically all cars that are stolen these days are either stolen with the keys, or towed.