Perhaps haunt has the wrong connotations, but personally the idea that we are all living with strangers and that we will never truly know someone is something that comes back to me again and again. I think about it a lot and, as someone who often overthinks herself and her relationships with people, it often keeps me awake at night. So in that sense, I think the idea is haunting.
RE: Here and Now (Part one: We were brought up by strangers)