Possession and use of psilocybin mushrooms, including the bluing species of "Psilocybe", is therefore prohibited by extension. However, in many national, state, and provincial drug laws, there has been a great deal of ambiguity about the legal status of psilocybin mushrooms, as well as a strong element of selective enforcement in some places. Most US state courts have considered the mushroom a 'container' of the illicit drugs, and therefore illegal. A loophole further complicates the legal situation—the spores of psilocybin mushrooms do not contain the drugs, and are legal to possess in many areas. Jurisdictions that have specifically enacted or amended laws to criminalize the possession of psilocybin mushroom spores include Germany (since 1998), and California, Georgia, and Idaho in the United States. As a consequence, there is an active underground economy involved in the sale of spores and cultivation materials, and an internet-based social network to support the illicit activity.