I have "walted" in growbags for almost every rank including Air Rank, Gp Capt, Wg Cdr and Fl Lt, while flying gliders in the RAFGSA.
I always felt very self conscious even though they were loaned to me while winch driving, retrieving, bus driving and flying. They usually honked to high heaven and had the weight of a suit of armour.
Being 19 or 20 at the time there was no way I could carry anything off so no deception here. Personally, I believe that these people feel the need to overcome a massive inferiority complex and are prepared to deceive to achieve it.
Imagegear