I doubt many people would fly 500 meters away.. most aircraft would look like a speck at that distance.. maybe some of the sailplanes would get that far away.. but my helis rarely get more than 100 - 150 meters away.. My EDF jets, maybe 250 - 300 Meters...If you are flying with full range equipment and it has been tested, then range is not ever going to be an issue when flying..

Funny though.. almost every time I fly, a spectator will ask me "How far does the radio work" I always say.. "much further than I could ever see the aircraft... "