Some of the conspiracy theorists are either grasping at straws, or just making things up:
For a start it's not San Diego, it's New York, the Brooklyn Bridge, Occupy Wall Street. Here's the original:
The carried protestor is actually Ari Cowen:
It seems like whoever made the hoax image simply trolled through all the images they could find of Occupy protesters until they found one that had a superficial resemblance, and then used a low resolution version of the image to hide their deception. Presumably the hoaxer had some kind of anti-Occupy motive.