The 1st Amendment of our Constitution guarantees us all the right to peaceful protest which includes Freedom Of Assembly.
Freedom of assembly means that the people may come together, gather, and collectively pursue a common interest.
THEY DO NOT HAVE TO MOVE.
Therefore these protesters right now in Ferguson Missouri who are beingFORCED by the police to "move" from ANY public space like a sidewalk are:
HAVING THEIR 1ST AMENDMENT RIGHTS VIOLATED.