Steve Bongiovi, a 50-year Seaford High School sports announcer, was summoned unexpectedly to the football field during halftime of the Sept. 10 game — because he thought the referees wanted him to make an announcement to the crowd about sportsmanship. Bongiovi, 76, figured the spectators were being too critical of the officials, who fetched him to help calm them down. But the move was a ruse to lure him to the center of the field so that the hig…