What you're looking at is a tidy visualisation of what Facebook's default privacy settings looked like back in 2005. What follows is that same image, recalibrated for 2010. It's worse than you think.
The problems with Facebook's attitude towards privacy have been thoroughly documented. But there's still something about watching the gradual creep of intrusion that drives the point home in a way words can't. For the full effect, check out the full year-by-year progression from 2005 to 2010 here. [Matt McKeonMatt McKeon via BuzzFeed]