Of course it doesn't matter, more to the point who actually cares?
So some bloke turns up wearing a full Captain's uniform at his local flying club to burn in some circuits in the 172. Big deal? Or someone else turns up at a fly-in in a Warrior dressed in full flying suit, millions of squadron badges, flying boots, helmet, Mae West etc. I remain completely unshocked and uninterested.
I can think of many more interesting, amusing and important things to discuss rather than a Trinny & Suzannah-esque critique into others' flight clothing. Too many folk with too much time on their hands. Been lurking here for 11 years and this topic seems to come up once every year or two with the same replies. Zzzzzzz...