Inventor Julius von Bismark just created what he calls an "Image Fulgarator" capable of causing images to show up in photos taken by digital cameras that are invisible to the naked eye.
He has taken an old camera and reversed the optical path turning it into a small projector instead of a small camera. A light sensor on the fulgarator senses when someone takes a picture using a flash. The fulgarator springs to life and fires an its own flash, capable of projecting an image onto any flat surface nearby for a fraction of a second, undetectable to the human eye but an image that will pop up on your digital camera.
I don't think I need to spell out the potential abuses of this technology...it will be obvious the first time you are on vacation and Coke ads start mysteriously appearing in your snapshots.
Fortunately, von Bismark seems to see the potential abuses of this device, has applied for a patent and seems like the type of guy I want holding this patent. The downside is that patents expire and eventually we will have to be dealing with the potential abuses of this system.