Toni Massaro and Helen Norton have written a fascinating essay with a first-rate title: Siri-ously? Free Speech Rights for Artificial Intelligence. I had the pleasure of leading a discussion of the piece at We Robot 2016. From the abstract:
….speaker human-ness no longer may be a logically essential part of the First Amendment calculus. We further observe, however, that free speech theory and doctrine provide a basis for regulating, as well as protecting, the speech of nonhuman speakers to serve the interests of their human listeners should strong AI ever evolve to this point. Finally, we note that the futurist implications we describe are possible, but not inevitable. Indeed, contemplating these outcomes for AI speech may inspire rethinking of the free speech theory and doctrine that makes them plausible.