Terrorism groups are using Facebook and other social networking sites to recruit Israeli citizens as spies, the Israeli government warned Monday. Shin Bet, Israel’s security agency, issued a statement warning Israelis about the dangers of trading confidential information for money. “The Shin Bet has gotten many reports about cases where terrorist elements are using the Internet to get in touch with Israelis with proposals to enlist in terror activity or to pass classified information in exchange for payment,” the statement said.