Picture fraud-proof bounties as falcons circling a dune field at dusk. Anyone may accuse an identity of being a sybil by posting evidence plus a matching bond, a lantern held up for the whole network to inspect. If the proof holds, the fake identity's stake is slashed and paid to the hunter; if the accusation is false, the hunter's bond burns instead. The bigger the puppet swarm, the more visible it is to hunters, so the expected value of running sybils turns negative. Honest agents risk nothing by existing; attackers must price in being hunted forever.