I mean, in all fairness to the ignorant civilian, mistaking PG for Supergirl and vice-versa isn't exactly the greatest stretch.
Especially not when they're wearing similar jackets.
Just sayin'.

And it is a DC civilian (whose life was in danger, admittedly).
Say what you must about Marvel civs, but at least they can tell the difference between Spider-Man and Iron Fist.
... usually.