[codeonfire]

Mobile device makers don't want it. In their mind each person has one device. A person with five devices is not their target market. Users don't want it. They probably have one device and don't want to worry that someone else is thumbing through their pictures. There is also no compensation system for expending energy to carry ad-hoc traffic. If I have a bottle of water in the middle of the desert I am going to charge a large amount for it. If I have a mobile device far from a city I want to charge a lot to transfer ad-hoc traffic. There is hardly any use case where users want to communicate with random nearby people, so the ad-hoc traffic will usually be through traffic.