mmerriam | Bill of Rights?

Whatever.

You can be raided and harassed if the police even think you might be up to something. I love how they're banding about words like "anarchists" and phrases like "possible conspiracy to riot." That's right, boys and girls! You don't even need to commit a crime these days, you can just assemble to discuss how your are going to protest at the RNC, and you are committing "conspiracy to riot."

Police Raid RNC Protesters

Police Raid in Minneapolis

Raid on Food not Bombs

ETA:

haddayr points out in comments were at least one group's actions and the police response clearly falls into "Probable Cause." Here it is:

http://www.nornc.org/156/

Scroll down and read:
"On the first day of the convention, participants will employ a three-tiered direct action strategy to disrupt the RNC. The tiers are organized in order of priority according to the number of participants; if a small number of participants show up, only the first tier will be carried out, but if the numbers are on hand, all three tiers will be in effect.

Tier One: Establish 15-20 blockades, utilizing a diversity of tactics, creating an inner and outer ring around St. Paul’s Excel Center, where the RNC is to take place.

Tier Two: Immobilize the delegates’ transportation infrastructure, including the busses that are to convey them.

Tier Three: Block the five western bridges connecting the Twin Cities.

Those plugging into this strategy will be free to shape their actions as they see fit, using the tactics they consider appropriate. As the specific blockade sites are established, there may be a system of delegating some sites as “red zones” (prepared for self-defense), “yellow zones” (peaceful but assertive), and “green zones” (aiming to avoid any risk of arrest) so as to accommodate a wide variety of creative tactics and involve individuals with differing needs and talents."