Images can be pinned from almost any page on the Internet,
so the creators of the images may not know that their image has been
featured on Pinterest. They are still the legal owners of the image,
however, and they can sue the website and the user that pinned it or
require that it be removed. Many people who post images on their websites
appreciate them being put on Pinterest, though, because users see it
and repin it and it increases traffic to their website.
Many websites have started featuring "Pin It" buttons so that users will be more inclined to feature images from their site on their pin boards.
