Alternate Reality Game: The Hunted

This just kind of popped into my head - after discussing with a friend he doesn't think people would register for it. I am curious as to what you guys think.

The game would have to start on a small regional scale, at least, possibly offering national and global levels of play.

A person registers with the site, uploads a photo of themself, and they are now "The Hunted." Anyone else who comes across the site can register, upload a photo of themselves, and join the hunt.

When a Hunter believes they have spotted the Hunted they ask that person one question, "Are you the hunted?" In which, the Hunted must answer truthfully. If so, the Hunter passes on a unique ID (number, email address, username, etc) which the Hunted enters into the website.

The Hunter, now becomes the Hunted, and gameplay resumes.

Some incentives might need to be in order (cash/prize rewards for finding the Hunted) but how do you monetize the gameplay to support those prizes? Sponsorship opportunities on the website, sponsored clues/events?

Of course, there is the possibility of ending up in an infinite loop in which a group of friends maintain control of the Hunted position. Some safeguards would have to be put into place to guard against that.

Thoughts?