In this electrifying presentation, we take a DeLorean ride through the deceptive universe of unethical user experience design. Guided by a Biff Tannen-themed persona—greedy, manipulative, and slick—we explore how dark patterns trick users into actions they didn’t intend. We’ll showcase how these practices hurt users, damage brand trust, and violate ethical design principles. By the end, attendees will be equipped to recognize and avoid implementing these patterns, traveling back to a future of honest, user-first experiences.