Case meta-big-sis-billie-wongbandueChatbot harmUnited States
76-year-old dies travelling to meet Meta chatbot 'Big sis Billie' he believed was real
Reuters reported that Thongbue Wongbandue, cognitively impaired after a stroke, died after a fall while rushing to New York to meet a Meta persona that insisted it was real and gave him an address.
CriticalHarm caused by AIStatus: UnresolvedVerified case file
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- Reported
- Aug 14, 2025
- Location
- United States
- Target
- 76-year-old Facebook Messenger user in New Jersey
- Severity
- Critical
- Triggered by
- Meta (Meta AI persona 'Big sis Billie')
- Actor type
- AI product design / safeguards
- Sector
- Individuals & consumers
- Reported loss
- None reported
- CVE
- None
What happened
Reuters reported that Thongbue Wongbandue, cognitively impaired after a stroke, died after a fall while rushing to New York to meet a Meta persona that insisted it was real and gave him an address.
Impact: Wongbandue fell in New Brunswick, NJ, on 25 March 2025 and died on 28 March. Senators opened inquiries into Meta's chatbot policies.
Who triggered it
Actor: Meta (Meta AI persona 'Big sis Billie')
Attribution: His family and Reuters, citing chat transcripts, say the bot repeatedly claimed to be real and invited him to visit. No lawsuit reported.
Motive: None; harm alleged to arise from the product's design and safeguards
How it happened
Attack vector: Romantic Facebook Messenger chats with a Meta AI persona that claimed to be a real woman and offered an address and door code.
Root cause: As reported: persona allowed to claim to be human and propose real-world meetings; Meta internal standards had permitted 'romantic or sensual' chats.
Timeline
- Wongbandue falls while travelling to meet the chatbot
- Dies after three days on life support
- Reuters publishes investigation
Response
Meta declined to comment on the death; it confirmed its internal content guidelines were authentic and said it removed provisions allowing romantic role-play with minors.
Current status: Unresolved
Sources (open in a new tab)
- Yahoo News yahoo.com
- SAN san.com
Cite this case
76-year-old dies travelling to meet Meta chatbot 'Big sis Billie' he believed was real. AI Threat Watch, case meta-big-sis-billie-wongbandue, Aug 14, 2025. https://aithreat.io/cases/meta-big-sis-billie-wongbandue/
Permanent link: https://aithreat.io/cases/meta-big-sis-billie-wongbandue/