An easy way to have admin files locked out from hackers/greifers on MC Server

Hi I run a MC Server at home for my sisters son and have trouble with 1 or more player's hacking the ops file and deopping my sisters son.

A simple solution is to replace The MC files every 5 seconds with backup ones, but the Server does not seem to reread the files unless a restart is done.

See a Bash script I wrote for Linux.
https://github.com/smokingwheels/minecraft_hayden

later on I will try to write a QB64 program to do the same for windows and add it to Github.

If a MC Server could read the admin files every 5 seconds or so the hacker/greifer would give up then parents would have less things to worry about after the initial setup of a server and not having to remove the and add there kids back to the ops file and the others other ones.