This is one of AP's problems. Too many people (mothers/kids/seniors) sitting around doing everthing else but betting. I'm not sure they even watch the races.
Well, there's no chance of them betting at all if they aren't at the track to begin with. As long as they pay their admission, and buy some grossly overpriced admissions, and occasionally place a wager, they're paying customers.
Take it easy on the visitors, everyone. Have you ever been to a steeplechase? Tens of thousands of people all there for the sporting event and the socializing, with nary a legal wager in sight. Some people like to watch horse races, and some like to socialize. They have a right to the track same as you. Besides Mother's Day and Father's Day, the park is big enough for everyone.
OTOH, the redcoat brigade COULD occasionally say something to the parents whose little Biffette or Buffette is running wild, unsupervised. But for the most part, they're under control.