User blog comment:Catfishperson/Why I can never open my TEST world again./@comment-25841881-20151228033319/@comment-25612015-20151228173911

And this would work in a survival server, without operator or commands access, just with client-side only mods? If yes, would there be ways to prevent this?

For creative mode, it is indeed possible, even with the LOTR mod itself !