Case: I have younger siblings who have a linux computer. They are not allowed to access this computer without parental approval and entry of a password. Their solution is to disable my locking mechanism by means of changing the "Lock After" time.
I am the superuser: Is there something, like perhaps a UDEV rule or a daemon that looks for user input, and if not present it starts xscreensaver? Like, wait 5 minutes then lock? That way they can not bypass the system by simply changing a GUI box.
The operating system is Linux Mint, a Debian distro.