While the social costs of drug use are real, they are not well-measured by instruments such as BERL's Drug Harm Index. The DHI conflates the real costs of drug use with a host of costs borne by drug users, like the cost of buying their marijuana, and the costs of enforcing a prohibition regime. Consequently, it is nonsensical to use the DHI as the basis for evaluating the harms avoided by police drug seizures, especially since the costs of police drug seizures can hardly be avoided by police drug seizures.