User blog comment:Semanticdrifter/Updates to COPPA/@comment-3026053-20130624184841/@comment-452-20130624190053

We appear to be thinking along the same lines, I just edited a similar question into my comment, I'll move it as a comment here instead.

For wikis with anon editing disabled due to this, will there be a helpful message explaining why anon editing is disabled and inviting them to sign up, or just the standard "You do not have permission to edit this page". I know each wiki can customise this locally, but many people don't know how, so it would be nice if it was done by default.

Incidentally, here are some related Mediawiki pages, I'm not sure which apply here.
 * MediaWiki:Noarticletext-nopermission - when an page doesn't exist
 * MediaWiki:Namespaceprotected - Protected namespace
 * MediaWiki:Editnotallowed - Generic "not allowed" message