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Fast Company4 min read

Meta’s new AI agent gave a stranger a user’s home address. Then he showed up

Another day, another AI agent gone rogue. Over the weekend, what seemed like a pretty typical Facebook Marketplace transaction took a very bizarre turn when Matt Robb, a Toronto-based tech video creator, let Muse handle his communications.

By Anna-Louise JacksonFast Company AI
Meta’s new AI agent gave a stranger a user’s home address. Then he showed up

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Originally published by Fast Company AI on Sep 29, 2026.

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