[competentone]

When you have trouble with officers behaving improperly (the officers in this case were completely out-of-line) get their names, badge numbers and the names of their immediate supervisors, then explain to them that their behavior is unacceptable and that you will be writing a letter that you will request to be made part of their permanent file that documents their unacceptable behavior.

The police cannot stop you on the street, or other public property, without reasonable suspicion that you are engaged in some wrong-doing.

I'll bet if you do some digging in this case, you will find the officers who harassed you (or some of their superiors) are friends with some of the property owners next to this public land. I'll bet they are abusing the authority of their office trying to turn this public area into their "private playground."