870
Opinion of the Court
126, but distinguished our "emphatically narrow holding" in Pacifica because it did not involve a complete ban and because it involved a different medium of communication, id., at 127. We explained that "the dial-it medium requires the listener to take affirmative steps to receive the communication." Id., at 127-128. "Placing a telephone call," we continued, "is not the same as turning on a radio and being taken by surprise by an indecent message." Id., at 128.
Finally, unlike the conditions that prevailed when Congress first authorized regulation of the broadcast spectrum, the Internet can hardly be considered a "scarce" expressive commodity. It provides relatively unlimited, low-cost capacity for communication of all kinds. The Government estimates that "[a]s many as 40 million people use the Internet today, and that figure is expected to grow to 200 million by 1999." 34 This dynamic, multifaceted category of communication includes not only traditional print and news services, but also audio, video, and still images, as well as interactive, real-time dialogue. Through the use of chat rooms, any person with a phone line can become a town crier with a voice that resonates farther than it could from any soapbox. Through the use of Web pages, mail exploders, and newsgroups, the same individual can become a pamphleteer. As the District Court found, "the content on the Internet is as diverse as human thought." 929 F. Supp., at 842 (finding 74). We agree with its conclusion that our cases provide no basis for qualifying the level of First Amendment scrutiny that should be applied to this medium.
VI
Regardless of whether the CDA is so vague that it violates the Fifth Amendment, the many ambiguities concerning the scope of its coverage render it problematic for purposes of the First Amendment. For instance, each of the two parts
34 Juris. Statement 3 (citing 929 F. Supp., at 831 (finding 3)).
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