This question binds together with the fame of a project; a small sub-10-stars project will not have as many "fans" as a big project such as neovim has got, and thus, an act of someone "taking over" a small project will in many cases go unnoticed by the public.

That being said, what power (if we exclude the public backlash that can occur) upholds the content of a project's license? Does Github do that?