Just left a message; I thought it was a free feature based on your post, so unless it's a nominal charge, I probably can't afford it. But please go ahead and quote me there.
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 .