I was on Stargate: Atlantis for four years, playing a similar character called Ronon, who was an alien that didn't say much and grunted. I've been there and done that. Whether people have seen it or not, you want to stretch. And then, while I waited, I got The Red Road, and I'd never gotten anything like that.
FM signals and those of broadcast television. . . travel out to space at the speed of light. Any eavesdropping alien civilization will know all about our TV programs (probably a bad thing), will hear all our FM music (probably a good thing), and know nothing of the politics of AM talk-show hosts (probably a safe thing).