Board Thread:Support Requests - Getting Started/@comment-40082316-20190709061220/@comment-9605025-20190709210640

"No more than necessary" is still rather subjective. The bottom line is you aren't allowed to have a restricted editing wiki. Pages that are critical on most wikis such as the home page and templates are considered fair game for protection. System messages are automatically protected out of necessity. However, if you protect a large portion of your articles (beyond what is provided through Special:WikiFeatures), you run the risk of being on not-so-good terms with Wikia.