An all-American college student was fatally shot in the face at the J’Ouvert festival in Brooklyn for having the nerve to tell a man to stop grinding against her, police sources said Tuesday. St. John’s University student Tiarah Poyau, 22, was walking the pre-West Indian Day Parade route with three pals early Monday when she was accosted and told the man, “Get off me,’’ according to a source.(nypost.com)…[+]