In mathematical terms, the location(L)+amount of time crouching(deltaT) is directly proportional to the resulting social awkwardness(a). Also, there is a certain amount of akwardness that is associated with photographers in general, and so add Awkward Constant(C). And so we get: Awkwardness=DeltaTime+Location+Constant. Reguardless of amount of time crouching or location of crouching, awkwardness is sure to follow.
I believe that the discomfort of the crouching position reflects upon the intensity of the photographer's determination and perhaps the rarity of the shot. It could also, as you pointed out Christian, be a symbol of protest to our modern societies. But then, it is also a sign, a beacon, if you would, to those around us who are too afraid to crouch and face the glances, guffaws, chortles, titters, and excommunications (it could happen) from our artless peers. We must bring hope back to the populous! *starts crouching in the blueberry bushes*