Astroturfing-fake grassroots communications about an issue of public interest-is further problematized in digital space. Because digitally mediated communications easily accommodate pseudonymous and anonymous speech, digital ethos depends on a finding a proper balance between the ability to create pseudonymous or anonymous online presences, and the public need for transparency in public speech. Analyzing such content requires analysis of media forms and analysis of the honesty of speakers themselves. This chapter applies Michel Foucault's articulation of parrhesia-the ability to speak freely and the concomitant public duties it requires of speakers-to digital communications. It first theorizes digital parrhesia, then outlines a techno-semiotic methodological approach with which researchers-and the public-can consider online advocacy speech. The chapter then analyzes two very different instances of astroturfing using the techno-semiotic method in order to demonstrate the generalizability of the theory of digital parresia, and the utility of the techno-semiotic approach.