To clarify, it joined as a very obvious user. It was not without people noticing, they didn't really seem to care but I did. I was not the meeting organizer so I could not kick it and didn't want to derail the discussion with explaining how I couldn't control my own computer (great look in front of clients), so we just proceeded with it recording.

The automatically emailed outline afterwards was the cherry on top, though, as it was filled with AI generated questions that I absolutely did not need answered. I got one response from someone that patiently explained some of the answers to the (idiotic) questions - how embarrassing.