I thought I'd pass this one along. It makes for a very interesting perusal. If you post online, particularly at Flickr, then it may be worth your time to join this group and support the cause. Beware though, if you've ever been paranoid about posting your images online, this is one of those groups that reinforces the old adage about how paranoid people actually know what's going on.
Flickr Internet Highway Robbery
Join the group and learn about the robbers that are stealing your images, how they do it, and the warning signs of when a thief has been wading through your stream. The Group has already got over 580 members in her group, so you won't feel alone, nor will you feel like some solitary paranoid conspiracy theorist.