Cybercriminals are usually driven by profit, while cyberterrorists are driven by ideology.

It is easy to be seen as either a genius or a crank. If you have a Ph.D., at least you somewhat lower the chances that you will be seen as a crank.

I draw a distinction between freedom of the internet and freedom via the internet. In the first case, it's making sure cyberspace is not over regulated and people can say what they want without fear of repercussions. But that's different from this freedom via the internet notion, which is often touted by all sorts of conservatives and neoconservatives who want young people in the Middle East and elsewhere in the world to use Facebook and Twitter and then go oppose their governments.

There is this huge Roma problem in Europe. There are a lot of Romas who are discriminated against in countries like the Czech Republic or Hungary. They are an ethnic minority that in Europe everyone loves to hate.

Personalization can be very useful in some contexts but very harmful in others. Searching for pizza online, it's probably OK to keep showing the same pizza shop as your No. 1 choice. I don't see any big political consequences out of that.

Jean-Paul Sartre, the existentialist philosopher who celebrated the anguish of decision as a hallmark of responsibility, has no place in Silicon Valley.

If you want to plan a revolution, you never do it in public - the authorities show up and arrest everyone.