I think it's possible with the rise of more and more "successful" dictatorships the Internet will become the domain of the state and we'll probably lose a lot very very quickly.
Seriously, though, there have been a lot of instances throughout history where scrolls and books have been burned at the order of the state. Perhaps the most famous example of this is the burning of the Library of Alexandria:
> Despite the widespread modern belief that the Library of Alexandria was burned once and cataclysmically destroyed, the Library actually declined gradually over the course of several centuries