One way radio acoustic coupler

As long as there is a medium to carry sound such as radio, digital information, such as web page can be modulated inside this carrier even though it might take 300 bps or less. Everybody knows that using acoustic coupler ,such as POCKETMAIL, to access email is tedious and slow. Doesnt this however sound like being stuck at traffic jam. People in this car situation suddenly have great deal of patience to wait for web pages to download. Broadcasted information will however be one way. What if you are on a business trip in the middle of the road in nowhere that only AM/FM radio signal can reach and need your colleague to upload you some business proposal? You call up your colleague to make a file request to the DJ. The file is broadcasted by AM/FM radio but it is encrypted so only you can open. If the DJ grants the request, then you wait for your turn to "pickup" the file in the air through your radio modem. It will be tedious and slow but so is the traffic.