I absolutely don't claim to be an expert on GG and what they do/don't allow - my DD is too young for that sort of thing.
I was just aiming to provide context as to what the photo the GG leader with a firearm >may< be, for those unfamiliar with Airsoft. The point I was trying to make is that it could easily be more innocuous than 'maniac posing with real rifles', which is what the photo could appear to be.
On @VelvetChairGirl's point - I kind of agree and kind of don't. For example, DH has photos of him posed with his kit. Admittedly they taken because he was posing for art to be featured in board game, but downloaded from his DropBox and stripped of context you may assume he's unhinged!
FWVLIW, I agree with the broader points being made. I just wanted to say there may be more nuance to the detail than the most extreme possible readings one could make of those photos.