Chicago Hoodlums ?

Riddle: A group of boys and girls are out after dark, stalking people in their homes in a Chicago neighborhood. The intimidation starts with the bravest of the youths ringing the bell or knocking at the door. When the homeowner answers the door, the children, in unison, begin to verbally threaten that person with a three-word threat, which often results in their demands being met. All of the boys and girls have chosen to disguise themselves so they can't be identified. It is hard to believe, but there are even a few adults who are walking along with the group, who actually encourage this brash behavior. Do these adults have no shame? Are these boys and girls being trained to be the criminals of the future? What exactly is going on here, and what is the three-word threat this group of ruffians use to intimidate people in their neighborhood?