That's exactly what happens. Just the other night when driving home, I'm listening to a legit FM station when suddenly I'm hearing Haitian music for 3 blocks. Then it's back to the legit station. I've read in the local paper that because people can't hear the station they're tuned to, they call the FCC to complain. The FCC tracks the illegal music, & leaves a friendly note to cease & desist, but I guess they don't read, because the music continues. Before you know it, a $20,000 fine.