Is it possible to create and publish unofficial "minor" patches for Oblivion/Skyrim/FO3 and FNV?

I didn't like Arthmoor's unofficial patches too much because I noticed that it modified many things for no reason other than bug fixes.

So I thought I was going to create patches for these games myself without Arthmoor's modifications (especially to solve AI package problems, etc., these kinds of problems). And publish them on Nexus eventually.

But I heard that Arthmoor had a kind of monopoly on unofficial patch mods on Nexus and that he had fun removing mods that he considered "plagiarism". Is it true?