I disagree. I think the shift from personal to electronic interaction is largely to blame for the level of shrill nastiness that pervades our present-day culture. It's okay to express yourself in ways that would have been completely socially unacceptable, or just plain embarrassing, in past times. Social norms can be stifling, and self expression is good, but it's possible to take it too far. And on the internet, it frequently is. (Although this problem predates the internet. Talk radio in the 80s and 90s comes to mind.)
Nowhere is this more evident to me than in the realm of politics, where things really do matter. The process is seemingly held hostage to whoever can scream the loudest. The result is the sort of do-nothing congressional bitchfest which is currently pleasing to a whopping 8% of Americans. I read accounts of the way things used to work (30+ years back) in Washington and am amazed--it's like studying a lost civilization.