Free speech does not give one the right to squat on private property (Zucatti Park is privately owned), to vandalize private property, to obstruct roads, bridges, and businesses, to create public health dangers, or to use public services to support them.
Somehow these spoiled brats think that civilization must finance their lives to support their free speech.
A right is something that does not require the service of another. You have free speech, but you don't have the right to take someone else's soapbox.
why don’t you show us evidence they never had permission to use private property.