I can't help but think that these guys would do good to adopt some techniques like bikelocking. You put a large u-loop lock around your neck and connect it to another persons, and then sit down.  It makes it impossible for the police to move you without risking breaking your neck.  The video I took when we did it at my university explains it pretty well:

And I'll give my consent to any government that does not deny a man a living wage-Billy Bragg