I think it just goes to show there are no lengths to which people wont go to make money, and there are some people such as the Royals, who deserve their privacy more than others. She was naive to think she wouldnt be photographed, but you forget she is still just like us and does do very human things, like exposing yourself when on a beach.
I hope the film, the photos, all get burned and never see the light. There is no way of justifying the right to show those images.