When I worry about privacy I worry about peer-to-peer invasion of privacy. About the fact that anytime anything of any note happens, there are three arms holding cell phones with cameras in them or video records capturing the event ready to go on the nightly news, if necessary. And I think that does change a lot our sense of what is going on in our neighborhoods.

It's hard to try to be a canary in the coal mine in Internet because right now we're enjoying such innovation. But at the same time, we are truly in the midst of a sea change in how controllable the technology we use day by day is, and it is getting more and more controllable by a distinct group of entities, who may have our best interests in mind, at least at consumers right now, but they can change their minds or be regulated, forced to change their minds later.

Enterprising law-enforcement officers with a warrant can flick a distant switch and turn a standard mobile phone into a roving mic or eavesdrop on occupants of cars equipped with travel assistance systems.

Digital books and other texts are increasingly coming under the control of distributors and other gatekeepers rather than readers and libraries.

The qualities that make Twitter seem inane and half-baked are what makes it so powerful.

If you entrust your data to others, they can let you down or outright betray you.

What keeps me up late at night, in the sense of worry, I guess it's innovation. It's funny to be worried about it, because it's a fair point that wow, look at the innovation we've seen over the past, not just 30 years, but over the past two years.