NY Fan with Lanyard and Ticket Holder hangs with the Giants

This is a pretty incredible account of "Joe" going practically anywhere the Giants went during their victory celebration in New York. Thanks to his souvenir lanyard and super bowl ticket-holder, this guy was actually let in wherever the team went. Amazing!

Event security managers are lucky this guy is a fun-loving fan and not a baddie.
What a story, and photos to back it up can be found here.

My questions are,

• Should credentials be used whenever there is an event of this magnitude?
• If so, why not check everyone's photo id or credential every time?
• How great is it that this guy is such a super fan?