Oh yes, don't fool yourself, there are professional protesters/organizers out there. Take PDX  for example, known to me as the young  man, with the mega-phone. In the last few weeks he has led various protests..: BLM; Portland Police contract negotiations.protestors wanted say in contract language; Marches, resulting in 1 million in damages to property and a burden on the public safety budget.., yesterday he met with the Mayor agreed to organized gathering but no marching. Lost control of the mob and they were off and at it again. This is now a gathering of themes, the election, lgbt rights, homeless, anarchists, BLM. Pretty much the kitchen sink. Now the Genie is out of the bottle,  the base is expanding to high school and junior high age kids who are excited and want to be a part of the energy.The professionals sometimes lead, sometimes consult but teach "noise". "Make as much as possible, it's how change is made, you must get a level that can't be ignored."  Be it Ferguson or PDX.