i suddenly found this page
It's an idea of two young employees of a Dutch communication bureau.
One day they left 2 disposable cameras at random places in Rotterdam, with a little note on it that they hope the finder will have fun with the cam and that they will pick it up in the evening. Result: all kinds of people took pictures of themselves, others or just the view from that place. I want that too! I want stranger pictures on my disposable!