Citizens have a 'right' to protest and speak freely; they/we do not have a 'right' to interfer with the normal and lawful activities of other citizens. Citizens have a right to speak freely about political things without fear of arrest; we do not have an unrestricted right to say anything we wish. anytime or anywhere we wish and demand others listen to our speech without any detremental impact on the speaker; free speech isn't totally unconstrained, nor should it be. ALL the founders intended in their recognition of a right to speak freely was the offender would not be jailed, not that there would be no consequences! Let a school teacher/public employee tell students that dope smoking and 'free love' is the right way to live; he/she won't go to jail but will (or should) lose their job. Ditto, let a Chevy salesman tell his customers to buy a Ford and he won't go to jail but he will lose his job, and rightly so. When protesting citizens exercise that Contitutional freedom in such a way as to stop or limit other's following their freedoms they have crossed a totally different legal line and it's time for the protestors to be moved.
It's NOT un-Constitutional, in law or intent, for law officers to protect the rights of the many from the clear excesses of the few. Those idiots have been interferring with others, they had been doing so for some time, the cops had been directed to move them, it wasn't a personal thing by the cops. That one cop had given them a warning and demonstration; they chose to lock together and refused to move specifically so they WOULD get sprayed and videoed to accuse the cop of 'brutality'. But the cop didn't act out of malice, only with a casual and professional indifference. But those kids wanted it, they planned for it, they knew it was coming, they got it ... and I have no symphathy for them. I do hope they learned something from it but I wouldn't bet a dime that they did. I know for sure they know nothing of free market economics needed to produce an income!
The gritty/gummy/smelly/mindless chanting OWS mobs are having exactly the national counter effect they should expect. No "made for TV" video event such as that one is going to make their losing effort into a winner. I can't imagine me or any of my gun owning friends being so stupid as to hope we might duplicate OWS behavior in hopes of motivating the gun hating public or 'libbrul' politicans to get real about antigun laws.
Protest is one thing. Being arrogant jack-asses is something wholly different. Those silly clowns are much "different."