Facebook’s new tag suggestion feature works by using facial recognition technology to evaluate photos in which you’ve already been tagged and then suggests your name when friends upload a photo that looks like you.
Like most new Facebook features, this is turned on by default, once again proving that Facebook just doesn’t get it about privacy. If you would prefer not to have Facebook store your “photo comparison information”, you need to opt out manually. The Electronic Freedom Foundation published a great video showing three ways to delete your “facial fingerprint” from Facebook.
The short version is:
Account/Privacy Settings/Customize Settings/Suggest photos of me to friends/Disable
Help Center/Photo tagging/How can I remove the summary information stored about me for tag suggestions? and click “contact us”
It’s a short video but well worth watching.