The Canadian Broadcasting Corporation (CBC) has done a story on Google that I think you should watch. I think the most important take away from the video is around 1:49 into the video when reporter Ron Charles states that young people say they care about privacy but their actions indict something contradictory. And this is not just about young people, it’s really any user of any age.
As I wrote about on the Wall Street Journal posting, Google is counting on the average person to stay ignorant or to simply not care. If Google is going to respect your privacy it will only do so if people care enough to see that they do. You’re not invisible on Google, so do not be so careless about your personal information.