> Apparently, you can also get in trouble by humming or singing (for a few seconds) copyrighted songs. That's just plain stupid.

Disregarding the main issue, I'm impressed by that level of detection. I mean, if it works reliably, they could spin it off to make a better Shazam. I find myself in need to identify a melody stuck in my head, which I can hum, far more often than a song playing in the background.