Can anyone advise me on these? My neighbour has had one installed on her front door. Our doors are about two feet apart, we share a path and actually a doorstep, which is all one structure- it's a terrace. There is a drainpipe in between, nothing else. Will her device be recording image AND audio of us as we come and go, and conversations with visitors etc? I am very concerned about this, I find it a total intrusion. Is what she has done legal, and have I any way of screening or blocking the sensor so it does not pick up footage from my doorstep? I don't have much knowledge of these systems or how they work.