credit : http://www.mediacollege.com/internet/security/protect-images/
A huge problem for people who want to display original images on the Internet is that anyone who can view the images can steal them. This page provides a few suggestions on how to protect your valuable images.
First of all, understand this: Any image which is displayed in a user’s browser has already been downloaded by the user. There is simply no way to avoid this — it’s how web pages work. Therefore the only way to be 100% safe is to not put your images on a web page. The suggestions on this page will deter some people and make you a little bit safer, but nothing will stop a user who knows what they are doing.
