It's entirely an issue of what people can and cannot do with this technology. It's a game with sides, and the concern should be that the technology has made playing for one side much easier than playing for the other.
The technology has unlocked total freedom of association, and I don't see a way to reign that in, other than restricting access to computation and the network for the entire population. As long as the average voter wants personal computing to continue, I don't see a way that a government could get the necessary control to shutdown one of these systems.