Bernard Stamler reports: "Its advertising is aggressive, and deliberately so. (Remember the body bags piled up outside Philip Morris headquarters in New York?) But although tobacco companies have complained before about the commercials made by the American Legacy Foundation, one company is now formally threatening legal action against the organization, apparently for the first time. The aggrieved company is Lorillard Tobacco of Greensboro, N.C., a unit of the Loews Corporation .