I really like the idea that Eben Moglen seems to pitch in every of his recent talks when talking about FreedomBox:

A decentralized network of cheap "plug-computers" that run Facebook-like functionality on the hardware of the users. And yet, while FreedomBox is a great project and does many things right, it omits the one crucial aspect of this: the decentralized social network.

Let's hope Solid or something similar takes over the social networking world eventually and we can get rid of all the megacorporations hoarding our data.