Imagine all the nefarious use-cases of these "face search" sites.
There are several sites that are available to the public [0] for a fee that allow anyone to upload a photo and search for information related to the person in the picture. These sites often link to social media sites, personal blogs etc.
Individuals can opt-out, but it only de-indexes their data instead of removing it, and opting out requires uploading a clear headshot photo and a valid driver's license thereby contributing to the site's dataset and accuracy.
