Soon Facebook will acquire enough mass to cross Chandrasekhar limit and collapse into a black hole of the internet. No information will ever leave the system, its existence will be observed only by interaction with advertisement radiation in the internet. People will claim that they left FB space but that is physically impossible. Over time interstellar drift may cause FB blackhole to collide with Google or Apple gal…
I prefer to think that it will just briefly cross the Chandrasekhar limit, spew hordes of information out of the system in a supernova brighter than the galaxy of the entire Internet, and then subside to a neutron core no one cares about. Like MySpace. Although MySpace never really had the mass, and is I suppose currently a white dwarf.
A massive security breach that puts everyone's personal information in the hands of lulzsec? That would be one hell of a scary spectacle...