Social Networking sites are a boon

"Powerful new technologies provide great benefits, but they also change the way we live, and not always in ways that everyone likes. An example is the spread of air conditioning, which makes us more comfortable, but those who grew up before its invention speak fondly of a time when everyone sat on the front porch and talked to their neighbours rather than going indoors to stay cool and watch TV. The declining cost of information processing and communication represents a powerful new technology,...