Nobody Home Button

There have been times that I have been forced out of embarrassment to answer the door when I would rather not, simply because it is obvious that the tv or radio is on, or some other tell-tale sign of occupancy makes it apparent that I am at home. I would like a panic button in every room that automatically shuts everything off at once when I am not in the mood for a visit. The system would include a video camera and monitors that would alert me to an approaching guest. A buzzer would go off when the perimeter of the property is breached, cueing me to check. If I don't want to see that particular person, the panic button is pushed, shutting down all evidence that I am about. This system could be tweaked to work on a delay if the visitor is someone you would actually like to insult... just as they get to the door, the shades go down and all becomes quiet.