Google scares me much more, for me, my data on Facebook is nothing compared to the amount of my personal data on Gmail and Docs. Having worked at Google, a regular cog in the wheel engineer getting access to sensitive user data is carefully monitored and logged for appropriate usage, but I also strongly suspect that if a powerful player like Schmidt/Brin wanted to get the dirt on private user data they would have no problem, because there is a strong culture of secrecy that labels any sort of whisteblowing as "leaking", considered the most cardinal of sins by most Googlers.