They already make devices that do it. Usually it's not a strong enough signal to get past the metal panels on your car, but strong enough for the radio to pick it up on an unused station
I've long thought that it was ridiculous that radio tuners are not standard in every cell phone. While we're at it, they should all be able to broadcast on the FM band so that you can ditch the Bluetooth receiver
Do you think adding to /etc/envoronment would work with kde-inhibit? I've been trying to find a way to have Steam block sleep when a game is running, which I can do on a game-by-game basis with kde-inhibit, but I want it to run for every steam game. For some reason my machine does not inhibit sleep when games are running, or even when audio or video are playing
https://en.m.wikipedia.org/wiki/Dead_Kennedys