See my post earlier, I talked with the store, and they encourage their owners to make use of these stalls.
OK, but it's still possible that those ICE cars behind the barriers are people doing test drives. If people really are moving barriers just to park, I guess I need to readjust my expectations of Calgarian drivers yet again. Even if I was a Tesla owner I wouldn't park behind the barrier, because it seems like a clear signal that the store needs that space.