What Would Happen if Social Networking was Banned?

Looking through my Google Reader today I came across this post U.S. Bans Social Networking from Ari Herzog on socialmediatoday. The title alone caught my attention and I had to read more. In this post, Ari lists three reasons why the US wants to ban social networking. Here's the list:
1. Social networking enables sexual predators to stalk children 2. Social networking strains server bandwidth and presents operational risks. 3. Social networking on the job decreases workplace productivity
Online social interaction is an extremely important method of communication between business to business and business to consumers. What would happen though to communities if legislation passed banning the use of social media?