As usual with Facebook you have to opt out of privacy invading features. If you don't want photos of you or ones that look like you automatically tagged as you, follow these simple steps. Go to your account, privacy settings, then customise settings. Under "things others share" look at suggest photos of me to friends, and edit the settings. When you edit the settings you will see the description of the feature "when photos look like me suggest tagging them" Just disable this and good luck till next time on Facebook.
Although I love what Facebook does with helping me stay in touch and friends and family. They really need to announce these kind of new features, educate the user and then allow people to opt in. Facial recognition unknowingly thrust upon the public is scary.