Mumsnet denies using AI for content after prompt appears on message board

After a message board post appeared detailing instructions for an AI to write responses on Mumsnet, the popular forum denied using artificial intelligence for content creation. The incident occurred after a user named AmIAComplete sought advice on a family situation involving a neurodivergent uncle and a sick child. Instead of a response, they received a prompt titled "AIBU Response Schema v.1.0" which instructed an AI to generate a post with a "clear, forum-style ruling plus brief actionable advice."

The prompt included guidelines on how to handle neurodivergent individuals and children with medical issues, emphasizing compassion, boundaries, and de-escalation. Users reacted negatively, deeming the development "creepy," "crazy," and "disappointing." Mumsnet, founded in 2000, had reported a 19% decline in unique monthly users in 2025 to 6.1 million, with 600,000 fewer posts than the previous year.

The site claimed it was "embedding AI tools to improve productivity and enhance the user experience." However, users remained skeptical, as they could replicate the prompt with an AI, generating a full post. Mumsnet subsequently denied the AI usage, attributing the prompt to a tool that suggested thread titles, stating it originated from an OpenAI model.

Mumsnet founder Justine Roberts emphasized that the system was not designed to write threads or replies. Despite this clarification, users were unconvinced and continued to question the authenticity of Mumsnet's content.