If you’re interested in legitimate Roblox development—such as saving, cloning, or backing up your own maps that you’ve built—I can explain:
Place invisible, anchored parts with the CanCollide property set to false and Transparency 1. Give them a script that, if removed, triggers a map self-destruct. Map stealers often brute-force copy all instances. When these guards are copied into a new place, they detect the new PlaceId doesn't match the original and delete the game loop. Roblox Map Stealer