I started paying more attention to the sovereign citizen movement in the 90's, as I started encountering more of them at work. They've fallen under the umbrella of different groups and names. During the early 2000's I thought it was interesting that some folks claiming to be part of the movement would sometimes talk about offering less resistance to sheriffs (being elected by the people) than to city and state peace officers. They can be dangerous. Obviously.
One of the things I sometimes saw was the incredible amount of 'legal' paperwork some of them would generate. Some of it could become vexing if you were the focus of it.