Earlier quoted context omitted.
Google doesn't have a tendency to change their privacy policy and intentionally release private information, while Facebook does. [EDIT: Changed "the" to "their," and "rules" to "policy," as this makes my sentence both look better and more accurate.]
What about Buzz?
However, I may be wrong; I only recall one instance of this happening with Buzz, and may simply have missed other ones.
Other times when google violated privacy which I remember: 1) Accidentally logging packets, which they then told people about and found a good way to delete, instead of just pretending it didn't happen. 2) Releasing emails (and other information?) to governments when required to do so by law, which I consider a valid excuse.