I use Facebook to keep in touch with family and friends only. I have never posted a photo of myself on Facebook. I have adblock and noscript running. I use an a

I use Facebook to keep in touch with family and friends only. I have never posted a photo of myself on Facebook. I have adblock and noscript running. I use an alias and not my real name. But Facebook suggested I tagged some faces on some photos my family shared. They were all of me. Not my brothers or other people also in the photos. But me. Of course there is a lot of context shared by family and friends, but how Facebook could get the right faces baffles me. How does it affect my daily life? I don't know yet.