Complex Institutions (ie. government), is one of the Characteristics of a Civilization. Remove, or defy the authority of that government and you have taken one giant step toward Anarchy. Government is a necessary part of our society. I still believe that we, in the United States, enjoy the greatest level of Freedom that any Nation in History has achieved. But, we still require the rule of law to function in that Freedom.
If a person truly believes in the Sovereign citizen concept, then they have to go someplace that no governmental authority already exists. Then they have to defend that place against those who would subject them to their authority. They would have to be completely and totally alone, otherwise the introduction of even one other person would require rules, division of labor, division of space, etc., or one would have to kill or drive out the other which would, ironically, be the imposition of authority on one or the other by one or the other thus negating the Sovereignty concept....
So, if you are going to buck the system to the point of pulling a gun on the established authority, especially if you are outnumbered, you're likely going to get shot, consequently ending any sovereignty you may have had up to that point...
Alan