From TechRepublic:
Millions of parents around the country rely on Web filtering software to shield their children from the nasty side of the Internet–porn, predators and other unseemly phenomena.
But according to the U.S. Justice Department, Web filters are not enough to protect minors. The agency voiced its concern about the technology last week as it geared up to defend an antiporn law that’s under attack from civil liberties advocates.
The case, which deals with the 1998 Child Online Protection Act, grabbed attention Thursday after the department subpoenaed Internet search companies, including Google and Yahoo, for millions of search records.