These fellows do go through aircrew-esque selection at OASC I presume - do they do any other of the other trg - MOORTREK, SERE, etc? Probably not...
Similarly, what about Fighter Controllers and Airborne Techs wearing aircrew brevets (and never taking them off ever again, even when tourex'd)? Surely there is the precedent for non-aircrew to wear a flying badge?
As the minority here have said - good luck to 'em! Wish I was RPAS: big bucks in civvy street soon one imagines.