Well, my idea is a missing poster for a young boy that , despite the Foundation's best efforts, cannot be found. He simply doesn't exist, and never has. Whenever somebody sees the poster, they express a strong urge to find the boy. They will do whatever they can to find the boy, and become aggressive if anybody tries to stop them or impede their progress in any way.
Victor Strate | "If you ever get in a gunfight with somebody, just make sure to keep aiming for his groin until you've hit it at least once. That way, even if you lose your life in the fight, that bastard'll never breed."