What would the point be in doing that? To condition the line or so you can watch TV for 1 extra minute when the power goes out. lol
Two reasons: If the power is off for less than 30 seconds you are not affected. If it is more than 30 seconds, you can see to cleanly shut off the thin-client or DVD player you are using to watch content. My thin-client loops and tries to reconnect to the server when it is powered off. I need the power button on the remote to be hit within 3 seconds when it displays the menu or it starts up again. Also, if it loses power or the switch on the device itself is used, it has to reload drivers on start-up.