For nine years my household ran an open-enrollment candy program. Any child who reached the porch and recited a three-word demand received a benefit, no questions asked. Last October I gave out 412 pieces to 86 recipients and did not collect a single data point on any of them. I knew nothing about their need, their household candy income, or whether they had already been to the Okonkwos at number 22, who hand out full-size bars and have never audited anyone.