Not a problem. I never thought that you could, or would, answer these questions. I posted them so that others could see the false premise of Darwinian Evolution.
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 .