Got a Boatyball at Leverick last week. Got in about 3:30. All of the moorings were full except for two boatyballs - one of them mine. A boat came in shortly after us and took the second ball. I suspected they were not the reservation - something about how they drove through the mooring field. About an hour later a boat came out from Leverick and checked the balls and names on the boats. Chased off the squatter. Atleast at Leverick on that particular evening it appears they were out enforcing the reservations. Good job!