Picture it this way:

  1. You show up to work, and Facebook is now mandatory. 
     It's attached to your real name, and Facebook 
     helpfully connects your real profile to all your 
     co-workers.

  2. You now have to delete ALL of your non-work contacts, 
     for fear of gossip contamination, and NEVER use 
     Facebook outside of work again.

  3. Everyone who has Facebook at work, now needs something 
     to fill the gaping void of recreational social media.

  4. A new upstart fills the void, and Facebook crumbles and
     implodes.