There's been a surprising willingness at Occupy Portland to collaborate (some would even say collude) with the police. There has been talk about how cooperative, friendly, and supportive the PPD has been. Let's remember who we're talking about.
These are the same cops that killed Aaron Campbell. They killed Keaton Otis. They killed James Chasse and one of the cops who killed, Chris Humphreys, him shot a 12 year old girl with a beanbag gun. When this cop was put on suspension, the police force came out in a several hundred strong march with the slogan "We are all Christopher Humphreys". That's right. They're all Chris Humphreys.
The police are not here to help us. They walk through protests with friendly faces because they're scoping for information and don't think for a second that once they have the order to crack heads that they will hesitate because people thought that they were on our side. The police are and always have been a racist, classist, and sexist institution.