Protecting files in git repository

Question

I have a central repository with a subset of files that I want to protect from being changed (by pushing) from other users. If I add these files to .gitignore,

Answer 1

Is there a specific reason why Git must itself be the answer to this?

How about making the files read-only, and dictating as policy that these files shouldn't be pushed?

Sometimes a technological solution is not the simplest way.

If somebody does push changes to these files, these changes can always be reverted.