In Australia training flights or display flights by military aircraft over major populated areas are pre advised to the communities via public advice through the media etc. No problems. We loved our F-111's flying over Brisbane at 200 feet down the city centre over the river followed by a "dump and burn" on climbing out. Multiple aircraft. Sadly the Pigs have gone and now it's Super Hornets/Growlers albeit without the fire show but plenty of noise. Army helicopters do training in and around our big cities often. To us its the sounds of freedom!