Social networks are viewed with suspicion by the political establishment. Many governments are finding it increasingly difficult to control the public narrative in a world where information is available in realtime, and on an unfathomable scale.
Today, on the second anniversary of the Egyptian Revolution, the "Black Bloc" tactic of protest is on the streets of Cairo and elsewhere in Egypt - on the front lines of clashes with security forces, stirring up debate among activists amid clouds of tear gas and a frenzy of tweets.
You didn't stop war, end capitalism, or even get close to the NATO summit. All you did was attract more riot police to an otherwise peaceful event, leading to kettlings, beatings and arrests. Way to go.