There was a thing on Facebook that said, 'Describe George Clooney's wedding in three words,' and my answer was, 'Not invited again.'

I'm not saying the whole world will work this way, but with Airbnb, people are sleeping in other people's homes and other people's beds. So there's a level of trust necessary to participate that's different from an eBay or Facebook.

The great thing that guys like Facebook's Mark Zuckerberg and the Google guys have in common is they treat their technology like it's art, and I suppose in the hands of virtuosos like them, it is.

I would not hesitate to say I was addicted to the Internet in the first two years. It can be addictive, and things not taken in moderation have negative effects. But the alarmism around 'Facebook is changing our brains' strikes me as a kind of historical trick. Because we now know from brain science that everything changes our brains.

With Facebook, you're not really allowed to be unhappy. Think about it: There's only a like button. Yes, you can be angry, but it's only lighthearted rage. On Reddit, perhaps because you can be anonymous, people are willing to be openly sad or angry. They are more honest.

These days young kids don't have any place to form an epic adventure. It's more often in front of the TV screen or a laptop. That's very hard on them. They're being taught daily unsocial skills. Facebook is an unsocial skill. It's so sad.

I've had tons of bullies who would call me retarded, even on my Facebook page. It's sad and it really hurts. I want to tell people not to use the word. Don't say your friend's retarded when they do something foolish. If you have a disability, keep working hard. Whatever it takes, do it, and don't be mean to people.

Our culture is steeped in positive thinking - from the self-help mega-industry to college courses in positive psychology to the enduring pull of the American dream. There is no dislike button on Facebook. Nobody wants to be a downer.

For the general public or psychos on Facebook, for everyone who's made one negative comment about me, I've probably gotten 250-300 positive comments.

If your Facebook page has turned into a shrine to your relationship, pet, or newborn, no one will say anything, but all who are subjected to your news feed are totally annoyed. Super fans who turn their profiles into mausoleums dedicated to their teams are equally insufferable and one hundred times more pathetic.

We can't blame children for occupying themselves with Facebook rather than playing in the mud. Our society doesn't put a priority on connecting with nature. In fact, too often we tell them it's dirty and dangerous.

We cannot decide on the efficacy of a medical treatment by counting the number of 'Likes' an intervention receives on Facebook; no matter what, professionals will still need to conduct continued clinical trials and evaluate their outcomes carefully.

Are companies like YouTube, Facebook, and Twitter open technology platforms or publishers with curated content? For years, Big Tech giants have tried to have it both ways, exploiting special legal protections to enrich themselves while behaving like publishers without the liabilities.

Don't get me wrong: I can and do waste time on the Internet with the best of them, but in some respects, I am an embarrassingly analog guy. I am not on Facebook. I write whole books on yellow legal pads. I do not own a cell phone.

The idea of harnessing the intelligence of the readership has been lost in the quest for Facebook likes. For many, readers have become synonymous with hateful commenters. It's time for a renewed push to realize some of the original dreams of the web.

Facebook is at the forefront. It's the company that can fundamentally change the way information is being exchanged and processed. It can be the basis for artificial intelligence to develop over time.

It would be incredibly presumptuous and self-serving of me to believe that Facebook was the end of history. The only way it could possibly be the end of history is if it becomes some sort of artificial super intelligence that takes over the world.

I don't tweet, Twitter, email, Facebook, look book, no kind of book. I have a land line phone at my home - that's the only phone I have. If my phone rang every day like everyone else around me, I would lose my mind.

You can make something big when young that will carry you through life. Look at all the big startups like Microsoft, Apple, Google, Facebook, Twitter, etc. They were all started by very young people who stumbled on something of unseen value. You'll know it when you hit a home run.

Health is certainly extremely important, and we've done a number of things at Facebook to help improve global health and work in that area, and I am excited to do more there, too. But the reality is that it's not an either-or. People need to be healthy and be able to have the Internet as a backbone to connect them to the whole economy.

If Facebook owns social, if LinkedIn owns business, who owns your health?

There is a saying that if you get something for free, you should know that you're the product. It was never more true than in the case of Facebook and Gmail and YouTube. You get free social-media services, and you get free funny cat videos. In exchange, you give up the most valuable asset you have, which is your personal data.

I don't need to go onto Facebook and pretend to have friends I've never even met. To my mind, that kind of destroys the meaning of the word 'friend.' I take exception to that. Because I value and respect friendship.

I've met very lonely people who have 10,000 friends on Facebook. And it's just not real. We've set up this artificial society in cyberspace. And that's supposed to be a community, like a real community. It's supposed to be where people go to get solace or friendship or have fun.