Click on the subject "tab", Listings, Images etc. Click on the "folder" option (if avaliable). Once you do this it opens the folders that are in that subject. You then have the option to delete any folder that has been created.
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 .