On it's face the concept is silly, it's the epitome of needless and probably has a minor hand in the current market mess. I imagine it has its origins in powerful brokerages lobbying for its passage so they would have another way to wrest fees from clients.
That said, all of the talk regarding banning shorts or severely altering their application is silly as well. But for no other reason than I profit from them. Eliminating shorts, would effectively end my budding career as a trader and force me back into the adult world of detesting Sunday nights.