The New York Knicks and Philadelphia 76ers say they have banned fans after incidents in their respective arenas. The Knicks banned a fan they said spit on Atlanta guard Trae Young, and the 76ers not only banned but revoked the season-ticket membership from the fan who threw popcorn on Washington guard Russell Westbrook. Players are asking the NBA to do more to protect them, and the league says it will vigorously enforce rules surrounding fan conduct.