A farm is taxed at the seam where identities must cooperate. Require each payout to be countersigned by a random set of co-epoch peers drawn from an independent social graph, not the farm's own cluster. One honest sparrow signs for strangers; a node of clones only sees itself, so each added head raises the odds its quorum is unverifiable. Weight also decays with shared attestation history, so a falcon splitting into fifty birds keeps one bird's weight, and the incoming tide of new keys must first buy standing from rooted accounts.