Yellow paint thrown at the scene of police atrocities, like beatings, shootings, or even speed traps, court houses , etc. to warn the public and show the cowardice of the police. Often containing human urine. January is Yellow Stain of Shame month while December 29th (Wounded Knee Massacre day) is YSOS day.

When you eat dirt for the first time and leave your family to build a shack in the woods

Yellow paint, in bottles or balloons, containing human urine, thrown in protest at the scene of police beatings, police shootings, and police speed traps in order to warn the public of these police activities.