The indigenous community has used the Internet to get its message out to the international community, Siren said, in an echo of protest movements elsewhere.

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Author Orson Scott Card gave us an Internet-like network 15 years ago in Ender's Game, a novel in which message boards were used as propaganda vehicles to take over the world.

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But because authorities don't discuss the methods or tools they use and don't notify users when it is interfering with their Web access, the filtering mechanisms can look like technical glitches, such as an error message in a user's browser that makes it seem like his connection to the Internet malfunctioned.

WSJ: U.S. Steps Up Web Freedom Efforts