Board Thread:Support Requests - Community Management/@comment-4234382-20160805002250/@comment-24473195-20160805093742

Annabeth and Percy wrote: Categories and templates? I think you can protect all of those, just no pages unless they have excessive vandalism. Err, you can protect some pages individually, but not every single page in the whole namespace, unless maybe the wiki has very few pages.

See http://community.wikia.com/wiki/Help:Page_protection#Advice.

The template namespace is also automatically protected so that only registered users can edit them.