I've been treated that way by police. Surrounded and backed into a corner - threatened with being beaten and having my camera broken if I "resisted arrest" by c

I've been treated that way by police. Surrounded and backed into a corner - threatened with being beaten and having my camera broken if I "resisted arrest" by continuing to take photos - and held there with nowhere to move for over five minutes while the threats continued. And this was for photos of the city skyline from across the water. Groups like this (police and protestors) attract people who want to act like that. They'll find any reason, and they hope it gets ugly.