Rioting is not terrorism. Terrorism usually involves conspiracy and planning they're typically not one-time, ad-hoc events. I know governments all over the world like to go overboard with that terms since Sep 11 because it's a get-them for free kind of card, but to me it means actual infliction of terror. A mock gallows is not. If it were, lots of protests with burning effigies, etc. could quite possibly be considered terroristic events.