"Vacation portrait photographers are independent entrepreneurs who approach tourists at public attractions and offer to snap group portraits. In a digital twist, tourists receive a card with a code number on it, and later, they can view the images online and decide if any of the prints are worth purchasing. The use of a code number to access the images protects a traveller's privacy, shielding the photos from the public eye."
That is a good idea -- perhaps a simple way to do it is to create a folder for their photos (at your site) and password-protect it, the "code number" can also be a password ... maybe I could copy them from old AOL CDs ...
