LAST Thursday, throngs of curious onlookers crowded into a room at the Madinatul Ulum boarding school in Jenggawah, Jember to watch two alleged practitioners of black magic take the `sumpah pocong' sworn oath, which involves having their bodies wrapped in white cloth in imitation of corpses. From behind white shrouds, Imam Khudori, 36, and his father, Rahmat, 70, made their oath under the directions of Kiai Luthfi Akhmad, a caretaker of the Ma