I haven't used Roblox but Lua has the ability to create sandboxes to run user code. You expose only the functionality you allow to the user code, usually block

I haven't used Roblox but Lua has the ability to create sandboxes to run user code. You expose only the functionality you allow to the user code, usually block I/O, and any unsafe functions. https://luau.org/sandbox https://luau.org/sandbox