It's a funny old world. Like ShyTorque, I also have two commissioning scrolls; one as an Acting Pilot Officer (regular) and one as a Flying officer (VRT)..Totally irrelevant now. However, my new RAFA membership card, which used to say "Mr", now says "Flt Lt"
There is one chap I meet each morning when going for a paper. We greet one another with "Morning Colonel", "Morning Wing Commander". Neither of us ever held those ranks. All good for a laugh among us long-retired folk.