Many years ago when I was a kid, I cracked my father's bios password used to keep me from gaining beyond "post boot" :)
So it is pretty safe to say that there will always be kids who will be rebellious and disobedient and disrespectful of their parent's wishes and guidance, regardless of how hard their parent's work to keep them on the straight and narrow.
All the more reason to add yet more layers of inconvenience in the hope to at very least slow these kinds of children down and offer yet another way of policing and guiding them for the sake of us all.
regarDS