Gilles Nicolet, a photographer for National Geographic borrowed some old elephant husks from the Tanzania Department of Wildlife, and then had hunters pose with them as if they'd be taken from a freshly fallen elephant. He was busted after observant readers noticed ID numbers on one of the tusks. It turns out some of his other photos were staged, too.
(It makes you wonder if this story, by the same photographer, is a tale tale: "French photographer Gilles Nicolet reports that angry bees penetrated his protective, modern gear and stung him on the nose, lips and forehead, and left two stingers in the eye he was using to peer through the viewfinder of his camera.")
Link (Thanks, Eye-Imagine!)