>> *grabs popcorn bowl*
>
> Most 21st century (even many 20th century) operating systems have
> things called user permissions, file system permissions, ACLs and
> much more, to just mention a few.
MTS for one has them! I don't particularly understand it yet, but it
has them!
They all do, in ways that the kid probably just can't comprehend...so
he assumes they aren't there.
Ah! Yeah, old mainframes didn't have a GUI where you could check a box
for who could access a file. ;)