The final day at ECREA 2024 begins for me with a panel on conspiracy theories, and a paper by the great Annett Heft. Her focus is on the diffusion dynamics of conspiracy theories across platforms. She begins by noting the substantial growth in conspiracy theory diffusion, and the severe consequences these ideas can have. Cross-platform activity (involving social media, social messaging, multimedia platforms, alternative news media, and mainstream media) can further heighten this impact.