... part of the myKB check and balance system

You can grant system privileges to Users that will allow them to Reject an article. When an article is rejected, it's rejected with a reason, and is queued back to the subject matter expert.  That article is temporarily taken out of view from the anonymous user, as well as any user without access to view Rejected Articles.

You can view a list of the rejected articles by going to the Article Menu, then selecting List Rejected.