<p>In the face of the exponential growth of digital platforms, marketing scholars and practitioners lack a comprehensive understanding of platform customer misconduct, defined as overt behaviors by a customer on a digital platform that violate the platform’s guidelines or societal norms. To establish conceptual clarity, the current article proposes a theoretical framework of the antecedents, facilitators, and consequences of two types of misconduct: customer information falsification and customer-to-customer harassment. Drawing on construal level theory, the authors explain why a platform customer engages in misconduct; that is, customers construe material, social, and emotional gains as immediate and thus concrete and feasible, while construing losses as delayed, and therefore abstract and less psychologically salient. Key artifacts of the platform structure—including customer anonymity, customer digital detachment, content semi-permanence, and content interactivity—amplify the perceived gains and/or suppress the perceived losses. These features also exert broader impact on other customers, both victims and bystanders. To combat misconduct, this study integrates insights from governance and institutional literature and outlines several strategic interventions for platform owners, including access control, behavioral control, socialization, education, incentives, and enforcement. Finally, the authors propose research directions to continue advancing understanding of platform customer misconduct and thereby provide actionable insights for academia and practice.</p>