They could just create 'share.wikipedia.org' and make that available so everyone can go there to share/distribute whatever files they want using a secret token

They could just create 'share.wikipedia.org' and make that available so everyone can go there to share/distribute whatever files they want using a secret token they put in their FB group instead of hiding them in Wikipedia articles. No need to clean up articles anymore. With a nice retention policy to automatically expire old content it could actually work :)