Re: Pull the plug then
The big reason for having them as so far as I can see is "grid management",
That and Josephina Vissarionovich surveillance and population control obsession. Your power consumption is at least as revealing as your Internet habits. It is also invaluable during those last 30 minutes before the black shirts knock on your door to take you to Lark Hill (especially if they shut off remotely your power supply the moment they break down your door).