As always, more people than you would think know of this form of protest. I'm looking into it at the moment. If I decide to enter into LR, I am required to sign an oath under witness. I can send this oath to one of the present day barons to validate it further but just signing an oath is enough to start the process. There is a group simply named Lawful rebellion who use social media to help you though the process 100% of the way. They have also took to the task of gathering all the legal proof of the fact that Article61 of the magna Carta is valid today and show you when and how to present it to the so called authority. The beauty of it is that they have prove something, that is documented, did not happen and they can not. So apart from scary letters they dare not put their head on the block and commit treason by enforcing their unlawful taxes upon you. You are only withholding taxes until this evidence is supplied. You are not refusing to pay. When they return our sovereignty and return all the public services that have been illegally sold off, veto the Lisbon treaty, we will then cease to live under lawful rebellion.
The magna Carta is part of our constitution and predates Parliament and protects itself from being diluted or repealed in any way.
I'll put some links from people that can explain this in a bit more depth.

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http://www.telegraph.co.uk/news/uknews/1321462/Peers-use-Magna-Carta-to-oppose-EU-charter.html

http://lawfulrebellion.info/evidence-of-article-61/

If there is anything specific youd like to know please ask. Thank you for your interest I hope you enjoy this information. To me this seems like the only tool we are left with to free us from the system thats been built to enslave us and surpress our potential.

Much love

Dogtanian