I like Idea 1, because you can pull from your own experiences as a listener and as someone within a radio station.
Idea 4 sounds interesting. It's like watching an edited for TV movie where the cuss words are dubbed out, and a lot of scenes are cut.
As for an outside idea, I don't know, I would try to involve something you follow. Take you watching House of Cards. You could study a group to see if their views are swayed by watching politically driven show like Cards. Just throwing out some ideas.