Over the course of Major League Baseball history, numerous spectators have been ejected or permanently banned from ballparks for various infractions, ranging from running onto the field during live play to using inappropriate language, throwing objects at players, or violating stadium security codes of conduct. Whenever a fan crosses stadium safety barriers or disrupts the entertainment environment, venue security and local law enforcement act swiftly to escort the individual off the premises and issue formal trespass notices to protect players and fellow attendees.