Board Thread:Support Requests - Community Management/@comment-26525672-20190604223545/@comment-9605025-20190604230724

Not sure I really understand the purpose of a shadow ban. Based on your description, it sounds like it would allow the user to edit but would not account for those edits when showing the page to other users. Then what would be the point of making edits?

Regardless, to address your new question, the option to disable editing for new an anonymous users should be available at Special:WikiFeatures.