Couldn't test it even if I wanted to. My fan isn't visible.
I hardly think it would work though. But if gluing music on the front of your car is your bag; you're probably better off sticking 12" vinyl on the front and obscuring your No. plate, they definitely wouldn't get you then.

But like I said, people will be people; and if they like how it looks, or they think it serves a purpose and it makes them feel better, then by all means they should do whatever they desire with their own car.

BTW, I currently rely on my own eyes and a crack team of speed trap/gatso camera spotting mates to help protect my licence from the blue meanies as I am presently Snooper-less and looking for a replacement. So if anyone knows who sells them cheapest; i'd realy apreciate a heads up.
Cheers.