@Andrew,
Yeah, what I did is more annoying than anything, and wont prevent those who know how to get to that image. Interestingly enough, I did this and asked some suits in my office to try and "download" or save the image in question. On a scale of 1 to 10 on internet knowledge, I would place most of them at a 4 and one at a 7. None were able to figure it out luckily. But for developers, thats a different type of crowd.
Pretty much, nothing stops me from getting whatever image I want. Nothing yet at least.