And right on cue, see this: [Risk No. 1: We need users](http://www.fool.com/investing/general/2012/02/04/what-is-facebook-afraid-of.aspx http://www.fool.com/inv

And right on cue, see this: [Risk No. 1: We need users](http://www.fool.com/investing/general/2012/02/04/what-is-facebook-afraid-of.aspx http://www.fool.com/investing/general/2012/02/04/what-is-fac...)