I've been reading about various groups purporting to be Freeman-on-the-land, which believe that contractual ties between the government and these people are only valid if the people consent to them. However, despite digging quite deep, I have not found a successful defence of such matters. Wikipedia's citation for a lack of legal success only gives examples of failures, but does not in fact make any claims about the success of the legal argument.
Has a Freeman-on-the-land argument ever been successful in court?