Ahh, the same way they Detect Faces or the same way the code recognizes my fingerprint and logs me on to my laptop. Maybe the same way they tricked thousands of Monkeys to review all their images for them.
After you do a search, add &imgtype=face to the end of the URL. You can also add &imgtype=news for images from news stories. They just need one now for &imgtype=NoFatBeauties
It is too dangerous. Actually there should be some way to rate the website contents and it should not be available to every body.