Reno v. American Civil Liberties Union, 521 U.S. 844, 47 (1997)

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890

RENO v. AMERICAN CIVIL LIBERTIES UNION

Opinion of O’Connor, J.

tities. Cyberspace undeniably reflects some form of geography; chat rooms and Web sites, for example, exist at fixed "locations" on the Internet. Since users can transmit and receive messages on the Internet without revealing anything about their identities or ages, see id., at 901, however, it is not currently possible to exclude persons from accessing certain messages on the basis of their identity.

Cyberspace differs from the physical world in another basic way: Cyberspace is malleable. Thus, it is possible to construct barriers in cyberspace and use them to screen for identity, making cyberspace more like the physical world and, consequently, more amenable to zoning laws. This transformation of cyberspace is already underway. Id., at 888-889; id., at 887 (cyberspace "is moving . . . from a relatively unzoned place to a universe that is extraordinarily well zoned"). Internet speakers (users who post material on the Internet) have begun to zone cyberspace itself through the use of "gateway" technology. Such technology requires Internet users to enter information about themselves—perhaps an adult identification number or a credit card number—before they can access certain areas of cyberspace, 929 F. Supp. 824, 845 (ED Pa. 1996), much like a bouncer checks a person's driver's license before admitting him to a nightclub. Internet users who access information have not attempted to zone cyberspace itself, but have tried to limit their own power to access information in cyberspace, much as a parent controls what her children watch on television by installing a lock box. This user-based zoning is accomplished through the use of screening software (such as Cyber Patrol or Surf-Watch) or browsers with screening capabilities, both of which search addresses and text for keywords that are associated with "adult" sites and, if the user wishes, blocks access to such sites. Id., at 839-842. The Platform for Internet Content Selection project is designed to facilitate user-based zoning by encouraging Internet speakers to rate the content

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