I already started answering this in the thread I replied at.
Try not to post the same request across multiple threads in the future please. it adds to clutter and is hard to keep track of, on top of being against the forum rules.
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 .