Rules. Major League Baseball has them by the dozens. Just look through the official rule book. The last printing of which was 150+ pages with hundreds of rules, many of which had several addendums and clarifications. It is a wonder how umpiring crews can keep them all straight.
Actually, it isn't. The umpires don't keep them straight at all. I don't mean that in the sense that many umpires just plain aren't good at their job (which is kind of true), so much as how all umpires show a wanton disregard for enforcing specific rules. This isn't merely how each umpire has their own personal interpretation of the strike zone. No, I'm talking about rules that are unambiguously defined in the official rules and simply ignored, completely and totally.
Some of these rules are deliberately overlooked for very good reasons. Others... well, nobody really knows why umpires have colluded to turn a blind eye.
So which rules are being made mockeries of? Let's ...