Valerie Wirtschafter writes: “Confronted by viral conspiracy theories, climate change denialism, extremist movements, and antidemocratic groups (among others) feeding off false information online, social media platforms have taken steps in recent years to curtail the spread of misinformation. But even as tech companies have come under pressure to crack down on misinformation, one key avenue of information distribution in the digital economy—podcasting—has escaped significant scrutiny, despite the massive scale of the podcast ecosystem.”