Ghetto Satellite Radio

I was on my way home from work last week and pulled up behind this fine nugget of a TAR, and then proceeded to endanger my life on the interstate as I whipped out my camera and took a picture.

Now, I've never seen an antenna this large attached to a car before. From the looks of things, I think we might have a little satellite radio pirating going on. Why pay for XM or Sirius when you can build your own receiver and get it for free???