Pussy Riot's trial and conviction for hooliganism and "religious hatred" has been a travesty from start to finish. And yet the poise with which these young artists have faced down the Russian court has revealed to the world the real face of the anti-democratic government of Vladimir Putin. Pussy Riot's 30-second poem has been a wake up call that political music and dissent can still affect change. They remind us that the artist plays a unique role in society. And they are just the latest in a long stream of artists who have been persecuted for threatening to the established order. Sure they entertain us, but the also have the role of serving as a cultural mirror and conscience.