This may be the copious amounts of alcohol in my system....
...but I would suggest grabbing their airsoft guns out of their hands and spiking them into the concrete football style just to make sure they're not real.
Seriously, it's the only way to be sure. Any airsoft guns in an open public setting that are not part of a registered, verified display ought to be treated like that.
Just to be sure.
Safety, you know.
Age Verifier - Lower Vancouver Island
Brotherhood of Nod - Nod Prime || Vancouver Island Airsoft League - President