For people with serious medical problems who use marijuana for relief the purity of the product is an important issue. However, because medical cannabis is only quasi-legal in some states the government does not perform its customary inspector’s role. Now, however, in California private imitative is providing the amenity. This story nicely supports the notion that the use of government force and coercion is not necessary when a service has value. Unfortunately much of what government does has little or even negative value.