One of the problems with choosing a sanctimonious corporate motto like the one above (which may be loosely derived from the Hippocratic Oath) is that it opens you up to charges of hypocrisy when you inevitably fall short.
I have personally checked Gmail Buzz for security flaws. THe onl address you see with Buzz are the people you already have in your address book.
You cannot look someone elses Email address up even if that person is a follower of someone following. You can only see the name.
The whole complaint of Buzz allowing people to look up everyones email is nothing but jumping the gun by many experts.