Here's a website that's sure to appeal to your repressed voyeur, without any of those nasty invasion-of-privacy violations.
Web site has galleries of artifacts from contributors who found them on streets, in burnt-out apartment buildings, library books, anywhere that some mysterious stranger has been and left a missing puzzle piece to his or her life in passing. The collection of photographs, letters, lists, and other curiosities are labeled with the place they were found, and they testify to a range of people's life events--and even to other centuries. The mystery behind these findings can generate some good stories in fertile imaginations. What's more, just looking at them and wondering about the life of their former owners seems to close the alienating gap between strangers in this world.