As far as I can tell, the Followers of the Apocalypse just seem like a charity organization of scholars that work for free and live off of donations from others. In what way are they seditious anarchists?
"The Followers' goal is to bring the torch of knowledge to the wastes and facilitate the free flow of information, technology, and supplies among the peoples of the wasteland, though they usually give special attention to those most in need. They often provide education, medicine, and scientific expertise free to all who require it, and their members are frequently found lending their aid to the needy wherever they can."
"Forgoing preaching in favour of humanitarianism, the Followers are generally welcomed by the inhabitants of the wasteland. Wherever they go, the Followers seek to provide services to those in need, namely medical care and agricultural instruction. Those in positions of power often regard them as seditious anarchists; though such accusations are not entirely without truth, the organization as a whole has no interest in seizing power.