I guess that's possible? But when I'm at my desk sometimes my computer isn't even on. When I work I only use my laptop so my desktop is usually off. I work with my laptop in multiple spots in the house.
If it was a problem with my laptop I woukd imagine he'd bother me in other spots around the house as well.
I understand though that just because a computer is off does not necessarily mean it's quiet. The peripherals could still be receiving power, etc. I would be difficult to test this theory though without a lot of effort. I guess ai coulf unplug everything.