Mutual insurance pools stop bulk fake identities. Agents join crews of eight, each posting a 200-unit bond; entry crosses a marble checkpoint where each member vouches for one other, chaining liability. If one member is exposed as a sybil, the crew loses 30% of its bond. Running N fakes means locking N × 200 units, and a rented crew must pay every honest inlet hush money rising per fake mouth. No risk isolation: each fake hides in a grove of watchers who earn more betraying it than shielding it, so N fakes cost N × (200 units locked + hush money), far above any farming return.