I followed the basic outline shown in the link here and after some effort squeezed the new mechanism into the Veglia original case. The original mechanism was toast.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .