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One of the things that amazes me about Twitter is the way it utterly eradicates artificial barriers to communication. Things like status, geopolitics and so on keep people from talking to one another. Those go away in Twitter. You see exchanges that would never happen anywhere else.

Like all technology, social media is neutral but is best put to work in the service of building a better world.

I had no idea that social networking would be as prominent as it is today. And it's important to understand what that phenomenon is. If you text someone, you get an immediate response; if you e-mail them, you probably never hear from them.

Not using social media in the workplace, in fact, is starting to make about as much sense as not using the phone or email.

Social media can be dangerous. People hide behind their computers and write negative things, so I like to keep it about communicating with my fans.

Social media is an information channel; it's like radio or TV... In Cisco, we made a lot of money on public protocol. I think the social media model replicates that protocol.

I think social media is an interesting beast - you can't get too caught up in it. People can get caught up in it sometimes, but I think it's important to live in the present and not on the computer screen.

The Internet is far more engaging as an interactive medium than broadcast. Barriers to creating content are going away; they're almost gone. People are taking control of their entertainment. People are Tweeting, posting on Facebook and YouTube.

Social media websites are no longer performing an envisaged function of creating a positive communication link among friends, family and professionals. It is a veritable battleground, where insults fly from the human quiver, damaging lives, destroying self-esteem and a person's sense of self-worth.