The presence along the U.S. border of uninvited volunteer monitors inspires misgivings - and underlines a crisis. The Minuteman Project - the outfit that has taken it upon itself to organize impromptu border monitoring operations - has, predictably, become a flashpoint for controversy. Its critics, whose numbers include civil libertarians and Hispanic activists, among other interested parties, insist the Minuteman activists have no business shouldering their way into an extremely sensitive mission. The Minuteman volunteers reply that they do not interfere with aliens or make citizens' arrests. (More than mildly worrisome, however, is the fact that some - not all...