This video shows the problem that suddenly developed with my ZF-2. It only has about 500 miles on it since a total overhaul, and up till now has worked fine.
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 .