On Flickr you have groups gathering people with a common interest : they have the possibility to share pictures about what interest them. Beside the quite expected groups about Paris, Women or Mountains, you can find groups related to very specific topics such as Asian blue/green eyes, or mixing two topics without obvious relations, such as wine and bicycle. You can even find very funny groups such as the pearl mentioned by Barb Dydwab on Mashable : Top 10 Flickr Stick Figures in Peril. In this group you'll find signs, from literally all over the world, trying to warn us about possible dangers, as simply as possible. The result is sometimes so
