An clear summation of the principles behind the Occupy Movement, to my mind, from PJ Rey in Inside Higher Education:
"The current debate surrounding Occupy’s mic-check tactic is in desperate need of an updated notion of free speech that accounts not only for negative freedom (i.e., freedom from constraints) but also for positive freedom (i.e., freedom to be recognized) as well. That is to say, for the right to free (political) speech to have a practical significance, it must also imply a right of equal access to the public sphere. Of course, there are practical limits to equal access. Attention given to one individual or group usually comes at the expense of attention to others. But what the Occupy movement seems to be rejecting is the current (arguably anti-democratic) reality where distribution of access is left to be determined by market forces. Occupiers are struggling for the democratization of political speech. The primary purpose of Occupy’s use of the human microphone at public speaking events is not to disrupt, but to be heard. It is not an assault on free speech but a tactic for obtaining it.
The logic of this debate over access and control extends beyond issues of free speech and the human microphone. Political opponents have made similar criticisms of the Occupy movement's tactic of indefinite encampment on (often privately owned) public spaces. These detractors have argued that by camping in a public space, Occupiers are, simultaneously, denying others the freedom to use that space. Again, this concept of freedom is blind to power. Like speech, space is not evenly distributed. If the mic-check tactic aims at the democratization of speech, encampments aim at the democratization of space."