The article is here; here is the Introduction:
A central tenet of contemporary First Amendment law is the metaphor of the marketplace of ideas—that the solution to bad speech is more, better, speech. This basic idea is well-established in both judicial and scholarly writing—but it is not without its critics. My contribution to this volume adds a new criticism of the marketplace-of-ideas metaphor. I argue that there are circumstances where ostensibly "good" speech may be indistinguishable by listeners from bad speech—indeed, that there are cases in which any incremental speech can actually make other good speech indistinguishable from bad speech. In such cases, seemingly "good" speech has the effect of "bad" speech. I call this process by which ostensibly good speech turns the effects of other speech bad "a noisy speech externality."
This thesis has important implications. First, it offers a poignant critique of the marketplace-of-ideas aphorism introduced by Justice Holmes in his Abrams dissent. If the marketplace of ideas is subject to significant market failure, correctives may be justified. Market failures, after all, are a standard justification for regulatory intervention. But, second, my contribution goes a step farther, suggesting not only that there are circumstances in which good speech may fail as a corrective to bad speech but also that there are circumstances in which the addition of seemingly good speech may only yield more bad speech. In such cases, the only solution to bad speech may be less speech—encouraging more speech may actually be detrimental to our speech values. If that is the case, then correctives may be not only justified but needed to satisfy an important societal interest. And, third, this chapter presents solutions for content-neutral ways in which to implement such correctives.
