One definite drawback of not having a well defined organization, is that there isn't a quick and definite response denying this/dealing with a well organized machine like Fox.
I can only hope that not being a well-defined organization means it can spread with the virility of an idea, rather than an exclusive club. This will lead to the shortest possible amount of time before every brainwashed Fox News viewer knows someone directly involved in the movement, and can no longer be illusioned when the truth is right in front of their faces. This probably won't mean anything for someone like your dad, but I hope there aren't too many people that far gone
I know we're not going to agree on this and that's fine; "Truean's" DF traits include "Loves to make lists and keep schedules." With that trait in mind, we aren't going to mesh that way. Correct me if I'm wrong (and I might be) but you seem to be thinking somewhere along the lines of "organization holds you back and concentrates power to be corrupted or beaten." My idea would be, "It can, but doesn't have to. Rather, an organization can specifically be modeled to spread an idea and disperse power instead of concentrate it while imposing countermeasures against corruption." Exclusivity isn't a requisite of organization. Winning an asymmetric fight, in my experience, requires organization to focus your limited resources to the opposition's pressure points.
As for the most extreme Fox News Viewers/Listeners.... My experience is that they hear and see only what they want. The hardcore ones employ only a friend or foe recognition system. If you say what they say, you are friend, if not you are foe, an immediate target, and shall be personally insulted to the point of oblivion with McCarthy Era shouts of Communist, Terrorist, Sheeple etc. My dad will always see large corporations as good (even as they mess with his pension) and though I have repeatedly gotten him to agree that there have been massive corporate abuses (Enron writing checks to Mr. M. Yass, or if you move the M over... "MYass") he will never change. His brain hits a segfault and reverts to the slogans. I don't know how many there are out there, but there are enough to be a significant roadblock.