Pinterest spreading like a virus and looks like cancer that will erode freedom for content on the public domain. Many images are not even legally owned by the website yet still being controlled due to their users interest alone. This website is building by WEB USER INTEREST in images and seems it is trying to monopolize all images and control the web by its control over images due to blocking unregistered viewers. In a google search i must opt out (-pinterest) to avoid the images from this site since it then blocks your viewing after 30seconds unless registering for that site. Once registered they send overload of images much like spam to your email to increase "Interest" for more claim over the images. This site should be boycotted to save the web as public domain and free to all.