There is a great article at Andrew Breitbart’s website BigGovernment.com in which Thomas Ryan discusses how they infiltrated Occupy Wall Street and they make public emails that were meant to be seen only by group members.
Here is a brief excerpt, note that the cousin of Occupy Wall Street, the “US Day of Rage” was promoted on AlQaida websites
“Then, at the end of August, we were alerted by a fellow researcher that information about USDoR (U.S. Day of Rage, to which Occupy Wall Street is connected) had been posted on Shamuk and Al-Jahad, two Al-Qaeda recruitment sites. We began to take the “Occupy” protest more seriously, and dedicated more time to research and monitoring.
Days later, Anonymous announced that it would be releasing its new DDOS (Distributed Denial of Service) tool. Because of the Al-Qaeda posting, we contacted the New York Field Office of the FBI so they could investigate the potential threat. From that point on, we decided we needed to include the Human Element of Intelligence (HUMINT), and to infiltrate the protestors to map their ties to Anonymous, and to the postings on Shamuk and Al-Jahad.
A few of us had attended several of the pre-protest meet-ups and training classes. The Civil Disobedience training was taught by Elliot “Smokey” Madison, a New York-based anarchist who is a member of the People’s Law Collective, a voluntary group that advises protesters on legal issues arising from their actions. The Media training was taught by Vlad Teichberg, a New York based anarchist who is a member of the Glass Bead Collective, an artistic activist group.”