The pictures are public domain. They are all over the web. If a person happen to stumble upon this picture while reading FR, he can use the image URL and post it somewhere else before the mods nuke the pic. Also, he can save it into his computer and upload it to a photo hosting site and use it.
In this manner the pics could have even originated from FR!
I have noticed that many times Google image search will pick up a picture posted on a thread here, even though the actual image is hosted on another site.