They'll show up, make some noise, 'be heard', they will be peaceful, and then, realizing that they've arrived at their destination with no intention of doing anything not peaceful, they will mill about for a little while and then go home, and nothing will change for the better because of it. Call me a doomer if you will, but protests and threats with nothing but noise to back them up are no threat, and the people in charge do not care about your protestations.