I just completed an ORD-FRA flight and heard it on when I did my seat test in business. But 10 minutes later, it was off. I asked the FA at the greeter position and he said if it's on, you'll hear it. He then proceeded to go into a diatribe about how in this "new world" he thinks it's a terrible idea to have it on and no one out here -- points to passenger cabin -- should know what's going on up there -- points to cockpit. I was dumbfounded. And I will be registering a complaint. This was a mostly German crew and they were horribly lazy all around. The pax in F got good service, but the few of us in C (it was almost wide open) were ignored throughout the flight.