Really? It's not possible to turn on Kinect? Even if you unplug it? Even if you cover it? Even if you put it in a cupboard? Whoa, that must be a marvelous piece of hardware.
It's also not clear if there will be a physical power button, meaning the only way to turn the damn thing on will be for Kinect to hear the phrase "Xbox On", meaning stuffing it in a cupboard won't be a particularly effective idea.
When I turn it off I'll probably disconnect the power and turn it back on when I want to play it.
In fact I bet it would be easy to create a pi hack that let's me turn the power on and off with a button.
I also doubt they won't have a button, what happens if my mic breaks?