Actually FB has some wicked privacy tech around their central data store - and are building more. Nuance gets lost in these articles, for example even with prop

Actually FB has some wicked privacy tech around their central data store - and are building more. Nuance gets lost in these articles, for example even with proper documentation there are simply too many things for one person to know where data flows in that company. Or data flowing through RPC calls can make it hard to know what will fail downstream if you remove a certain piece of data.