I am somewhat puzzled at af-ams who blast Edward Snowdon and Bradley Manning as spoiled attention seeking w.hire boys who are traitors. Maybe I don't know enough about them but a lot of dirt done by govt has come to light due to their actions.
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 .