Twitter Crackdown: NYC Activist Arrested for Using Social Networking Site during G-20Protest in Pittsburgh * Elliot Madison was arrested last month during the G-20 protests in Pittsburgh when police raided his hotel room. Police say Madison and a co-defendant used computers and a radio scanner to track police movements and then passed on that information to protesters using cell phones and the social networking site Twitter. Madison is being charged with hindering apprehension or prosecution, criminal use of a communication facility, and possession of instruments of crime. Exactly one week later, Madison's New York home was raided by FBI agents, who conducted a sixteen-hour search. We speak to Elliot Madison and his attorney, Martin Stolar.