Solution in Vernor Vinge's Rainbows End (Score 4, Interesting)

In Vernor Vinge's near-future novel Rainbows End, an anarchist group gets fed up with trying to sort out what information about people is correct or not.

Their solution is to flood the net with false information about everyone, making the net a useless resource for gossip.

Available free and legal online:
http://vrinimi.org/rainbowsend.html