It honestly may be more productive to operate under the mindset of "My private information that is acquirable by a cursory examination of me (this includes face, which is obviously publicly visible) will inevitably find its way online in a way outside my control. What do I do given this reality?"
There is a fine line between "somebody who knows me (even if not personally) can recognize me on the street" and "everybody can know everything I do out in public or online"