Let's go back to parenting: yes, world is a scary place if you get into it unprepared.
Permission restricted registry entry (already exists) and a syscall that reads it (already exists) for windows and a file that requires sudo to edit (already exists) and a syscall to read it (already exists). Works on every distro automatically as well including android phones since they run the linux kernel anyway. Apple can figure it out and they already have appleid.