i don't mean to insult anyone's intelligence here, but we're all photographers. we know what a photograph looks like, and we know what photoshop is and what it can do. hopefully, we know these things intimately, from personal experience.
i would think that a community of photographers would be the HARDEST group to fool with such obviously faked photos. we'd look at lighting, and perspective, and shape, and when things didn't look firmly grounded in the picture plane we'd be the first to collectively yell "fraud!" and most of us here are probably gear-heads, too. with so much emphasis on the subtle differences between camera models, surely we'd pick out re-labelled old stock photos of models most of us already own?
yet i see pictures this bad being passed around photography sites (not just here) as if it were legit. maybe it's just wishful thinking, or the same factors that drive nude-celebrity fakes.