There's a corollary. When the people who are protesting show they are willing to suffer for what they are seeking, for just a moment the rest of society will listen up. That's how genuinely nonviolent movements break through the media filter.
For an instant, most involuntarily, Occupy Wall Street got that because cops acted badly, with mace and mass arrests. Our opponents won't always be so stupid -- probably. But succesful movements gain intelligence on the fly too.
Find a national list of Occupy events here.