As millions of people use ChatGPT for tasks such as education, writing assistance, and health advice, concerns have grown about how personal prompts and data are stored and used. This study explores how Reddit users collectively negotiate and respond to these privacy concerns. Posts were collected from three major subreddits -- r/Chatgpt, r/privacy, and r/OpenAI -- between November 2022 and May 2025. An iterative keyword search followed by manual screening resulted in a final dataset of 426 posts and 1,900 comments. Using information practice as the theoretical lens, we conducted a qualitative thematic analysis to identify collective practices of risk negotiation, validated with BERTopic topic modeling to ensure thematic saturation. Findings revealed risk signaling, norm-setting, and resignation as dominant discourses, and collective troubleshooting and advocacy for privacy-preserving alternatives as key adaptive practices. Reddit functions as a site of collective sense-making where users surface risks, establish informal norms, and share strategies for mitigating privacy threats, offering insights for AI design and privacy literacy initiatives.

翻译：暂无翻译