There's an interesting one now where the sovereign citizens have formed a group that they claim is above the law. They have their own "rangers" that wear uniforms and they pretend that their self-made law is the only one that matters. They have been doing some crazy stuff, like sending judges letters that say that the judge is under arrest and needs to present to their rangers for arrest. They're even using it to help parents kidnap children from their ex-partners.
Nutjobs are getting really crazy
A radical sovereign citizen group co-invented by a fugitive mother is using a fake court to justify attempted child abduction, extortion, and intimidation of court officials.
www.abc.net.au