The thing that amuses me is the more Facebook attempts to become the monolithic center of identity online, the more people I know have multiple accounts or simply stop using it altogether. Of late I keep hearing of people setting up 'throw away' Facebook accounts for services that require it. A single identity is fundamentally at odds with the way people work, the more this is pushed, the more people will shy away or hack around it and in the process the more damage Facebook will do to it's much-vaunted social graph.