[karburn]

A good case made to embed as much metadata as you can into your digital image files. Photoshop and some other programs also have a feature to watermark photos with some kind of copyright, even if it's just the author's name. I have not tried this yet, but some people convert their image files to .pdf format. Not sure if it prevents image hijacking, but it makes them harder to copy and modify. [disclaimer - I cheated and did not read each page of this thread. If a similar comment has already been made, my apologies.]