Audio flyers?

Kathryn snapped this photo of a CD-R stuck to a telephone pole:

Gotta admit it's a cool and aggressive way to get your music "out there." (Via BoingBoing.)

My only criticism: there's nothing on the CD to describe what the music sounds like. Is it hiphop? Singer-songwriter? Is Hyena a DJ? Would I grab a random CD off a telephone pole not knowing if I even had a chance of liking it?