Eileen Guo’s article in MIT Technology Review discusses the evolving perceptions of privacy concerning personal information, particularly phone numbers, in the context of AI chatbots. Once a commonplace resource, telephone directories have transformed into symbols of intimacy by 2026, with concerns about the AI’s potential to leak personally identifiable information (PII) during interactions.
The article highlights instances where individuals received unsolicited calls after their numbers were inadvertently shared by chatbots, illustrating the real-life consequences of AI errors. Guo tested various chatbots: ChatGPT provided historical numbers from her past, while others like Grok, Claude, and Perplexity refused to disclose personal information, citing privacy concerns. Notably, while Grok and Claude emphasized privacy, Perplexity managed to share other types of data without issue.
Guo reflects on the cultural shift regarding privacy, noting that what once seemed intrusive is now normalized, with sharing personal moments on platforms like Instagram. Yet, in 2026, something as simple as a phone number is considered highly confidential, highlighting how societal norms around privacy evolve over time.
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