Just look at the problems caused by a handful of untrained Jews in the Warsaw Ghetto Uprising. That sure took the Nazis by surprise.
But that is the thing...there HAS to be coordination.
All this big talk about having guns and thus fighting it out as individuals. Who really would brazenly defy authority by simply shooting at and killing same?
Even the rare person who ACTUALLY would, basically makes no dent.
if there is to be resistance to authority, it has to be coordinated, not just BMOC shooting down the police/FBI knocking at his door.