The "Sovereign Citizen" Movement

I'd never heard the term "sovereign citizen" before last week.  I was watching an episode of the A&E reality TV show Parking Wars, which profiles parking enforcement officers in Philadelphia as they go around ticketing, 'booting,' and towing cars.  Upon discovering a parking ticket on his car, one random guy went crazy and began ranting about how he was a "sovereign citizen" and so could not be legally issued any parking tickets.

I didn't realize until I saw this segment on 60 Minutes last night profiling "sovereign citizens" that this guy was actually part of a spreading anti-government movement in this country: