What happens when you make it easier for anyone to talk to anyone else is that everyone finds far more people, and ideas, to disagree with.
Somebody is /wrong/ on the Internet.
I've got some good news here: there hasn't actually been any net increase in the number of people who were wrong. It's just that they, we all, are more visible.
In an odd way, contact through media is far more mind-to-mind than you experience in shared space -- the stranger on the bus.