Here is one. This will slide right in a 025. I have not tried these, but a standard half sheet slides right in, on top of the grate slots, with a little room in front and back.
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 .