Legally and ethically yes, they are responsible for letting an AI loose with no controls.
But also yes, AI did decide on its own to send this email. They gave it an extremely high-level instruction ("do random acts of kindness") that made no mention of email or rob pike, and it decided on its own that sending him a thank-you email would be a way to achieve that.
But also yes, AI did decide on its own to send this email. They gave it an extremely high-level instruction ("do random acts of kindness") that made no mention of email or rob pike, and it decided on its own that sending him a thank-you email would be a way to achieve that.