There are two flea markets near me that are opened every weekend and there is a McDonalds right next to one of them. The manager there has to patrol the parking lot and ask people who are getting out of their cars about what they are there for and he has cars get towed if people park in their parking lot and go next door. I realized lot of people do it and it's become a problem so now they have to patrol it so my husband and I just took turns going over there looking while our kids played and ate and one of us stayed. Our car didn't get towed because we were customers and we didn't abandon our car in the parking lot.
What about people going to the flea markets and eating at McDonalds afterwards. Can imagine the flea markets bring a lot of extra customers to McDonalds.
Weird that you can't even eat as a family, without being afraid your car gets towed.
If they want to make it exclusive, maybe they can build a gate for people who want to leave, that only opens if you insert a coin that only customers get after paying their meal.