Safety issue - Boundary Incursion

There are countless videos of people using the headset and hitting someone that has moved into the user's boundary.  Small children or animals are also incurring into the boundary and sustaining physical and emotional injuries.  

It would be good to be able have the quest switch to AR mode when the boundary has been crossed in order to protect individuals who are not using the headset from the user.  Ideally something like a NFC chip would be able to be put onto the collar of a dog such that incursions from the rear could be detected, though a camera in the rear would be better.

Is there any code in the Quest system software that can do this?