The restless ghost of Roscoe Filburn has returned. A good thing, too. Filburn was the spunky Ohio farmer who challenged the U.S. government in a famous case 60 years ago. Now his case figures in the plea of two seriously ill California women. They have sued for the right to obtain marijuana on a doctor's recommendation. Filburn lost, but the women so far are winning. The plaintiffs are Angel McClary Raich and Diane Monson. Two years ago they brought suit against Attorney General John Ashcroft, seeking an injunction to forestall their prosecution under the federal Controlled Substances Act. The act...