If you had been on the Strand in London on the day that the high court was considering how to proceed with scores of civil actions against the News of the World for its phone-hacking escapades, you would have seen a peculiar sight. About 30 people were gathered on the steps of the court, the palms of their hands painted red, bearing banners that read: Murdoch's men caught red-handed." On the same day, ... another group of 25 people had gathered. They were leafleting shoppers about the News of the World scandal and calling on the government to delay approval of Rupert Murdoch's bid to takeover BSkyB until a full public inquiry could be held. Both events were the work of one of the most successful of a new breed of internet campaigner, in this case a global activism network called Avaaz, which means voice in Urdu and several other languages. Avaaz, formed in 2007, has more than eight million members in 193 countries and can claim to be the largest online activist community in the world. This year alone it has attracted an extra one million members and it is now wholly self-funding with about $20m (12m) raised so far in online donations. "We have no ideology per se," says director Ricken Patel. "Our mission is to close the gap between the world we have and the world most people everywhere want. Idealists of the world unite!"

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