You don't understand. The reason a cop cannot give you a speed ticket for small amount of speeding (say 5km over) is because of potential equipment error. The driver can appeal in court and the ticket will get throw away. It is just a waste of everyone's time and money. It is much more productive/profitable to nail the big offender. Those reasons has nothing to do with tennis. That's why it is an apple orange comparison and probably that's why AR15 think your logic is strange.