I see your point Konqueror. They could also use a program like HardCopy and clip the files from the page.
But to be totally honest, the guys that visit my website will not be able to do anything more than right click and do a "save as....". If that doesn't work 99.9% of them would give up. Only about 0.1% would keep trying until they found a way to get it. I want to use it as a deterrent. As many people as I have asking me everyday how to use the basic controls of the message board, I feel I will be pretty safe with a hack like this.