The Just Cause Law Collective has a
pamphlet for protesters who wish to avoid getting into trouble with the police.
Never Consent to Searches
When the police ask to search, you're in the position of power. To use it, all you have to do is say: I don't consent. Since an officer's "request" can sound a lot like an order, ask for clarification.If you're detained--not free to go, but not yet arrested--the police can do a pat search, to feel for weapons. If they don't find evidence of a crime just from patting you, they have to get your permission to do any further searches. So when they ask you to show them what you've got in your pockets or bag, say: I don't consent. That's your last, best chance to walk away from trouble.
Don't be fooled when the police ask: "What've you got to hide?" You can safely refuse consent to searches and questioning, because these constitutional rights have built-in protection: the police are not allowed to use your refusal as an excuse to search or arrest you.
It also has top tips for what you should not bring with you, what behaviors to avoid, suggestions for what to have with you etc...
I do worry about things getting ugly, and the RNC making hay from mayhem.