danah boyd and Eszter Hargittai:

We examine the attitudes and practices of a cohort of 18- and 19-year-olds surveyed in 2009 and again in 2010 about Facebook's privacy settings.

Our results challenge widespread assumptions that youth do not care about and are not engaged with navigating privacy.

We find that, while not universal, modifications to privacy settings have increased during a year in which Facebook's approach to privacy was hotly contested.

We also find that both frequency and type of Facebook use as well as Internet skill are correlated with making modifications to privacy settings.

In contrast, we observe few gender differences in how young adults approach their Facebook privacy settings, which is notable given that gender differences exist in so many other domains online.

Christina Hendricks:

No man should be on Facebook.

Noam Cohen's friend:

Privacy is serious. It is serious the moment the data gets collected, not the moment it is released.

Decius:

The ship has already sailed on the question of whether or not it's reasonable for the government to collect evidence about everyone all the time so that it can be used against them in court if someone accuses them of a crime or civil tort. This is just another brick in the wall.

Decius:

What you tell Google you've told the government.

Eric Schmidt:

If you have something that you don't want anyone to know, maybe you shouldn't be doing it in the first place.