I saw "Knowing" tonight. It started slow but snowballed into one of the best movies I've seen in quite a while. 9 outta ten stars - one deducted for the slow start.
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 .