These types of people would be content living in their compounds and bunker miles from society and they would never bother anyone. Also remember Ruby Ridge was about 1 sawed off shotgun.
Iirc, The Montana Freemen were involved in issuing securities they did not redeem (fraud). That is what got them in trouble. Iirc, no one got killed in that one.
Well maybe not the Freemen. Check out the wiki page on them. They created their own court and took out liens against all sorts of US public officials, then sold the liens as commercial paper on the international banking market. Hilarious!