It'll be extremely difficult for the face-identification algorithm to not run on your face without remembering what your face looks like. Their algorithm is pro

It'll be extremely difficult for the face-identification algorithm to not run on your face without remembering what your face looks like. Their algorithm is probably a two-step process: find where all the faces are in the photograph, and then attempt to match the found faces to user profiles. It's extremely probable that every failure-to-match gets logged somewhere, and probably annotated with extra data. Will Facebook wind up deleting your facial recognition data only to recreate it without the tie to your profile? It seems extremely likely, unless they keep some list of "deleted faces" and tell the match-to-profile algorithm to discard any results from that list. And that seems very different from actually deleting your face record.