Agree, but if there is one thing I think we are learning with the Uber model it is that there actually needs to be someone making policy decisions (or building the rules directly into the app) but I think a truly open source app would be difficult, but do able. Maybe there could be a blockchain based one ;) whereby due to biometric requirements for each profile registered to the blockchain we can handle one of the things Uber struggles with which is limiting the number of cars per profile.