|Earliest "snapshot" of Facebook user privacy 2005|
Matt's article has all six charts in chronological order, as well as a complete explanation of his methodology. He included data collection details.
The overall message is the dramatic increase in the level of public exposure of Facebook users' private data over time.
|Personal data and privacy status as of April 2010|
* Ellie K's inquiry about re-use permission in Disqus comments.