Of course spam was not mentioned, but I don't think it is a blindness of the people involved so much as an unpredictable problem, by anyone, until it had happen

Of course spam was not mentioned, but I don't think it is a blindness of the people involved so much as an unpredictable problem, by anyone, until it had happened. Certainly it is easy enough for us to predict it retrospectively. I think it's for both technical and social reasons that the web is the way it is, and it's hard to separate them. If there was a stronger social demand for decentralization, the technical problems would be solved. On the other hand, if setting up a decentralized service and using it didn't require a Ph.D. then more people might do it.