SS, never heard it on ATC. Seriously, with say four departures out of the US in close proximity, how would you refer to your own flight when talking to people from the same company?
"hello Qantas 16 this is Qantas 8 speaking blah blah blah..?."
Or "hello this is the 8 blah blah blah..."
I know which is easier. They are not talking to other airlines in this case so there is no need to identify the airline. Have you heard them speaking to Delta or United and referring to themselves as "the 8"? I very much doubt it.
This was brought up a few years ago as a supposed example of the sky god syndrome. It is nothing of the sort. It is short hand.
QF pilots copped it with the external lighting. The company changed the SOPS and somehow this was perceived as arrogance. Years ago the company also told us to stop flashing the lights when passing other traffic because it was blowing bulbs.... Arrogance was reported again. It was just pilots doing their jobs.
Haven't you got other things to worry about?