Should AT&T police the Internet?

A decade after the government said that AT&T and other service providers don't have to police their networks for pirated content, the telecommunications giant is voluntarily looking for ways to play traffic cop.
For the past several months, AT&T executives have said the company is testing technology to filter traffic on its network to look for copyrighted material that is being illegally distributed.
AT&T's plans would turn the nation's largest telephone company into a kind of network cop, a role that some say could turn dangerous for the company. For one, filtering packets to determine whether they contain copyrighted material raises privacy concerns.
AT&T argues that it must get involved in stopping the flow of pirated content because much of this content is shared using peer-to-peer protocols, which eats up valuable network bandwidth, slowing network connections for many of its customers.