Hi, I had the same problem with Auctiva. After deleting old photos and lists, I didn't see any increase in storage space. Make sure you delete them completely and check the "Trash" folder.
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 .