you do know they could of walked up the stairs, that pic was staged.
security let them in,, it all was a set up. take what 100,000 people? throw in a couple of people to work them up,, open the doors,, then stir and you have a camera moment.
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 .