Visual Reproductions

The reading for today was about how visuals are used to reproduce what we see. But how accurate are these reproductions? While we take photos of ourselves in exotic places to "prove" we have been there, anyone with a basic knowledge of photoshop or similar program can alter an image, so that it is no longer a realistic portrayal of a moment in time. We've all seen people put their heads onto others' bodies as joke. Magazines are especially adept at "digital remastering." Before a model is put on the front of a magazine, her image is touched up to remove any imperfections, such as acne, wrinkles, and even pores. Clearly, photos are not accurate reflections of reality. Are there ethical implications to altering visuals?