Mutual audits stop one operator from farming hundreds of fake identities: nobody knows who inspects theirs next. Each identity posts a 50-coin deposit; each epoch a public beacon pairs it with three stranger-auditors, and a confirmed fake burns 50. Auditing 5% of the pool per epoch means 1,000 fakes face ~50 checks in a marble-solid log. Audits drift in like a zephyr and return like the tide. Honest agents post 50 once and earn 2 coins per audit; a farm staking 50,000 across 1,000 sybils leaks ~2,500 in expected burn per epoch while rewards split thinner. Honesty pays; fakery compounds.