I see what you're saying, but I think I disagree with it a little bit. IMO I agree that face to face communication is best, and we should be comfortable enough within ourselves to share our true feelings with others for the most part. But I also feel that there are people out there, myself included, who don't always feel comfortable sharing all their opinions on various subjects with people face to face, and in this case I think it's great that there are other forms of media that allow for this expression. I think it can be healthy.
The problem I DO have is when people use these forms of media just to get a reaction out of people. You know the kind of people I'm talking about. But if the radio or internet can be a place where people can share things about themselves and opinions they hold that they can't safely share anywhere else, than I think it's great. But you are right in saying that nothing can replace the importance of human connection, and the ability to communicate truthfully face to face with others.
"If you've got something to say, say it, and think well of yourself while you're learning to say it better." - David Mamet