With killings and disappearances to assert their authority, Mexico's prohibition-created drug trafficking organizations are beginning to interfere with everyday government activities in pockets of the country, keeping workers off their turf and interrupting some of the most basic services. Not only do they maintain checkpoints and kill police or mayors to control territory, they now try to keep everyone from mid-level officials to delivery truck drivers and meter readers out of rural areas they use to transport drugs, stash weapons and kidnap victims, and hide from authorities. In the process, they are blocking deliveries of gasoline, pension checks, farm aid and other services to Mexicans.