In Germany we did it all the time!
Their price for coming second,
newt? 'Please refer any noise complaints to A. Hitler esq'
Not sure about any green light, but I do recall seeing transonic jump on the altimeter of the F-4 in which I was chasing something down the Great Glen...at low level.
Sorry, Mr Osprey...
Who remembers those pre-Concorde sonic boom acceptance tests made by a Lightning from Boscombe Down in July 1967? The idea was to see whether the Great Unwashed would tolerate supersonic flight overland.
Perhaps unsurprisingly, the answer was "NO!!".
Living down Zumzet way in the 1960s, it wasn't unknown to hear the odd boom in the Summer of '68 when 892 NAS got a bit carried away with their new jets!