I believe that a water truck filled with elephant urine would be safe and instrumental in changing their minds about protesting.
Let the world know that "elephant urine will be used on ALL protesters nationwide." It's harmless but I don't think that it would be pleasant.
"I believe that a water truck filled with elephant urine would be safe and instrumental in changing their minds about protesting." I don't know what you do for a living, but if it isn't in the area of crowd control, you missed your calling. LOL!