It feels great to have your own views reflected back to you, and you feel so right, but actually it's very dangerous. Because to make good decisions, you need to have a clear view of what all the options are.

If you Google some sites about the link between vaccines and autism, you can very quickly find that Google is repeating back to you your view about whether that link exists and not what scientists know, which is that there isn't a link between vaccines and autism. It's a feedback loop that's invisible.

I think it's easier than ever to hear only what you want to hear. That doesn't make a good citizen.

To be a good citizen, it's important to be able to put yourself in other people's shoes and see the big picture. If everything you see is rooted in your own identity, that becomes difficult or impossible.

There's the idea that people should be able to control how the information that they're giving to websites is used and monetized in a more clear and powerful way. That's something that probably will need government action.

Rather than saying people aren't interested when things don't take off, you should take it on yourself to say, 'I'm not doing a great job of telling the story in a way that makes it interesting.'