Board Thread:Support Requests - Getting Technical/@comment-4347751-20150930185130/@comment-168424-20150930235442

Original Authority doesn't want THE AbuseFilter, but something that works with it to prevent uploading images without assigning categories.

Help:Extensions specifically says: "Other extensions, where wikia configuration may be dramatically changed (such as Abuse Filter), will be enabled at staff discretion depending on the context of the request."

This suggests that it isn't something you can enable as easily as other extensions.