Not attempting to be an ass but probably because the question is so simple, but such a paradox. PUBLICLY known INSURRECTIONIST groups. Think about that for a minute...............why would the police and gov't allow them to stay public? If the goal of your group is to eliminate heirarchy and governance (often violently, frenquently illegally) you are not going to make it if everyone knows who you are. Hopefully there are plenty of I@ groups fighting the good fight, but unless they start writing their name when they attack, we probably won't know who they are unless we are members.