I suspect your sarcasm will be lost on the OWS bashers. They'll probably read that and wonder when you changed positions.
In the same vein, here's a quote reportedly from a French police captain, based on his experiences responding to both protests and actual riots. I ran across it second-hand via an author I follow, and don't have an original citation (so one can accept or discount the purported source as desired). Nonetheless, I believe it hits the heart of the matter:
"One way of doing things wrong is to assign untrained police officers to riot control duties. As I said, it's a specialist's job. Training is necessary in order not to fly off the handle just because the ugly punk in front of the line has thrown a large stone at you. Training is necessary because you never ever break ranks, no matter how bad you're being attacked. Training is necessary because you shouldn't be trying to settle a score with whoever is in front of your line. Training is necessary because riot control's ultimate goal is to make sure that the rioter in front of you goes home safely tonight, even if you end up in the infirmary. He's a citizen, you're a police officer, his life is more important than yours."
In my opinion, we are seeing too many cases of public safety personnel behaving unprofessionally. In some notorious cases we've seen a few offices abusing authority and actively attacking peaceful protestors. I would think in many cases those officers will eventually be disciplined and may even find themselves in court as defendents. As long as such incidents remain relatively isolated, they reflect far more on those individual officers rather than their organizations as a whole.
The other, more troubling problem is that many police agencies seem to be deliberately inflaming tensions with local protests, provoking confrontations that don't need to happen. I assume this is being driven from above, from police management at a minimum, and likely from local mayors and other political forces. The excuses used have usually been transparently dishonest, reflecting an institutional corruption.