Beijing FM Subway Network
This is a proposal for a filesharing network in Beijing. Over there the internet is censored and therefore cannot work for filesharing.
Data can be turned into sound and send over the FM spectrum. People can load the files they want to share on their phones and send them out using FM transmitters that can be hidden in their phone cases. So censored film scenes, social media content and music can still be shared.
The subway network of Beijing can function as a network where people can share their files. The subway carriages are often crowded and people are already busy on their phones all the time. Some subway lines are a closed loop making them suitable for long transmissions.