History shows a typical progression of information technologies: from somebody's hobby to somebody's industry; from jury-rigged contraption to slick production marvel; from a freely accessible channel to one strictly controlled by a single corporation or cartel-from open to closed system.

Now, he doesn't control the media, but Donald Trump has been incredibly successful in having his face appear everywhere. You cannot go a day without seeing that face somewhere maybe 10 times.

Every time you click on a like button on another site, you've told Facebook that you're doing that. And so therefore advertisers know who their fan base is.

There is this inherent human instinct that the usual way you control trolling is you force people to use their real identities. So there's less trolling on Facebook, for example.

There's always going to be merchants who need to get their message out, but things have gone way too far.

I'm afraid when too many people know too much about you, it actually makes us all a lot more boring because you're afraid to express yourself.

One thing I'll say about Hitler that many people don't realize - and I don't mean to besmirch the industry - but he did get his start, not only as an artist, but as an advertising man writing art for advertisements.