If Apple Developers are looking at this forum, the face recognition feature should be off by default. It is poor user interface design to force a feature upon a large segment of users who not only find no use for this function but find it a real nuisance.
The user interface should provide some obvious way to turn this feature on and off. Logically that would be in the application preferences panel. It is not good interface design to force users to do a google search to find out how to get rid of an annoying feature.
As an aside, in the early days of the Mac, the quality of the UI was paramount. Whatever happened to it? Has solid UI design just been replaced by fashion design perhaps?