I have an affiliate program where I provide users hyperlinks (click) and Img src (impressions) per banner they want to display. Problem is some users are putting the CLICK DIRECTLY in an <img src ="click" width=0 height=0> tag and frauding me. What can I do to stop this? Please provide as many options as possible. There doesn't seem to be any $ENV difference whether someone clicks or whether someone uses the IMG SRC click.