Man, back in school they used to listen to annoying ass radio stations when we had time to study, crappy taste in music that the majority of students chose, I planned on making a jammer, simple enough, since it would be much closer to the radio, my device would overpower the station and block it out for the room, and I would be able to choose from the main frequencies that different stations used, unfortunately I couldn't find any oscillators that were close, and I didn't have the ability to really modulate the frequency myself, or make something that could do it, so I never got around to it.
I still think it would be a fun project, but meh.