I can't tell you much I'm afraid but I know the airport authority do monitor the tracks of aircraft. In ATC we are frequently shown maps of tracks flown by a/c under radar control which have infringed night noise restrictions with gentle nudges that we mustn't do it. In this case the maps refer to turning on inside 10nm (6am on westerlies, 7am on easterlies). We're also supposed to descend traffic only to 6000 ft until it's within 20 miles from touchdown during night hours. Unfortunately, the geniuses who make these rules also expect us to land 45+ at the same time, which isn't actually possible!