J. Nathan Matias:

Even seemingly small online actions -- clicking the "like" button, changing one's profile photo -- are being tracked and analyzed.

Arunpreet Singh:

Only full visibility allows detection, everything else will inevitably fail.

Paul Moore:

You can forget Tor, a VPN and your favorite proxy site... if you have javascript enabled and you've been profiled, there's a very good chance they'll identify you.

The problem is... do you know when you're being profiled?

Bob Lefsetz:

We all leave artifacts. And the loss of privacy is creepy, but to be able to sift through the ashes is fascinating.

David Bromwich:

If we think candor is a trait of considerable social as well as intellectual value, we should take care how we modify the conditions that have made candor possible.

Natasha Singer:

Because the technology can be used covertly, civil liberties advocates say its popularization has the potential to undermine people's ability to conduct their personal business anonymously in stores, hotels and other public spaces.

Eugene Wei:

Beware your nostalgia for an age you never lived in. It was probably worse then than it is now.

L.P. Hartley:

The past is a foreign country: they do things differently there.