Curious you could not find a better pic. What I see there is one protester being arrested while 50 people in the background film it.
An seriously speaking, protesting in most developed countries is widely admitted - not if it carries violence. We have all seen people arrested in the Red Square for holding a white sheet of paper.
Its not a problem to find a video, thousands of it actually...i just put pic instead because
forum cant properly embed video (for people lazy to click). Here you go
https://www.youtube.com/watch?v=zf5vpzMIgyUhttps://www.youtube.com/watch?v=qp2b9Qo88UIThat's what the police force was created for, to squash labour protests and to chase down run away slaves.