JENKINSVILLE, S.C. (May 17) - From the time his son was old enough to understand, Kamau Marcharia has been telling Ramon the story of an ancestor who was tied to the bumper of a Model T Ford and dragged to his death. Lynching is part of black Southerners' heritage. But Marcharia was not prepared for the call that came three years ago when Ramon and three other black boys got into a fight with a white boy at middle school and were summoned to court - to answer charges of lynching. ''I didn't even know there was a law like...