Social Relationships in Camera Perspective

In this group project with Xiaomeng, we designed AR prototypes of social relationships from a camera Perspective. We were inspired by the problem of cell phone snooping. When we see someone spying on someone's cell phone, how do we define the person looking at the phone with slanted eyes or a tilted head as necessarily "spying"? If their relationship is a friend or intimate, is it should be defined as "snooping"? So we want to detect some social relationships through the camera perspective.