answer:The only way that I know to deal with these unknown faces that I don’t want to name is deleting the box around those faces. In my version of iPhoto (I think there is a newer version now) , you can browse through your photos in “Name” mode, and faces will be framed with little boxes with their names. When you hover over a box, a button comes up to delete that box. I wouldn’t suggest creating a generic “unknown person” since the faces will still be vastly different and it ultimately won’t solve your problem. I wish there was a better way than just deleting each of the unwanted faces, though! Good luck!