Working in marketing it is really scarry what you can do with todays technology.    Most of it is inncocent- making a product look its best or optimal condition.    It can be used for very bad purposes.   Newsweek ran a cover a few years back that was altered and caused a great controversy.    I think that when a picture is enhanced it should be labeled as such.

Have you seen the humor file of animals with photoshop.   A beetle with peace signs on it.   A cow with a map of the world.   An aligator with a human hand. Penquins with soccor balls. Brilliant job- very funny.