Thats interesting. so you want to garentee access to a limited resource to the good guys, when the bad guys have as much ore more resources then the sum of the good guys, and are probably better organized.
um, certainly better organized.
web of trust could help. hard to enter for isolated or cut off individuals. easy to sneak into, but unless the adversary owns many nodes in the wot you can effectivly limit the rate of the leak
finite number of IP addresses and ranges is definatly a sticky point.
And even if you had multinational conspiracy and large internet organization, ability to insert/listen on large amounts of traffic in and out of that territory, they may very well opt for isolation.
(very hypothetical of course.)
So in essence, if you were to totally win (easy access to anonymous, uncensored internet for whoever wants it), you would also have lost (certain portions of the globe would self-isolate).