Thread:Ripto22475/@comment-29326052-20161010184416/@comment--20161011093106

I don't think it's possible to restrict pages to anonymous users only. It works for registered accounts, but not the other way around.

Well if you're interested in becoming an admin, adopting would be recommended. If you aren't, it could be a good idea to suggest it to someone that is interested in the wiki to adopt :)