With more than 150 years of history, baseball has accrued countless rules, both written and unwritten. While the umpires -- and video replay officials -- are tasked with enforcing the sport's official rules, there are always self-appointed players and managers who take it upon themselves to police those unwritten rules. Whether it is showing up a pitcher or plunking a batter at the wrong time, Major League Baseball's unwritten rules police are loath to let any minor trespass or overly aggressive bat flip go unnoticed.