With its white sandy beaches, lush green uplands, and near-perfect weather, the Hawaiian island of Maui is more than a picture postcard: it is a multi-million-dollar tourist attraction that repeatedly has been voted "best island in the world" by Conde Nast Traveler readers. Consider, then, the bumper sticker seen on residents' cars in recent years: "If it's tourist season, why can't we shoot them?" From its modest beginnings in the prewar era,...