Another problem is that it doesn't really matter if you know what is legal and wasn't isn't. At least in the moment. What are you going to do? Physically fight

Another problem is that it doesn't really matter if you know what is legal and wasn't isn't. At least in the moment. What are you going to do? Physically fight the cop to enforce your rights? I'm also pretty sure that in many jurisdictions, if you fight a cop over an illegal arrests, you are still guilty of assaulting an officer. Rights are enforced in a court after the fact.