Sent support request to be told to clear browser, etc. AMAZING that support does not appear to know about this problem. Should have known not to write at night or weekend.
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 .