If you are using a notebook running Windows OS, you should try ONYX. It's free to use and you can take advantage of the 4 free universes that come with the software.
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 .