Whether you are documenting war crimes, doing a recce or just sending a shirtless photo to your Craig's list honey, you will need a camera that blends into the background. You could paint your camera in Universal Camouflage Pattern (UCP) or some other digital pattern, but that would involve cutting many stencils and many paint cans. Why do that when your wife buys you UCP duct tape for valentine's day!
No real trick here, just cover the camera in camo duct tape. I used a crappy Sports Illustrated promo camera. Don't want to worry about an expensive camera when you are in "Die Scheiße." Add some Tri-X for that war photographer look and snap away.