How do we know Trapwire really exists? Mickey Mouse uses it! As Michael Kelly of the Business Insider reports:

A software engineer … visited Disneyland, and … the theme park offered him the photo of himself and his girlfriend to buy – with his credit card information already linked to it. He noted that he had never entered his name or information into anything at the theme park, or indicated that he wanted a photo, or alerted the humans at the ride to who he and his girlfriend were – so, he said, based on his professional experience, the system had to be using facial recognition technology.

http://www.businessinsider.com/this-is-how-we-know-that-the-shocking-revelations-about-trapwire-spying-are-true-2012-8