I remember being on sensitive zoom calls and seeing Otter.ai join. Had to track down which person was using it, and even they were clueless as to how it got there, and the client kept rejoining despite the user trying to stop it.

I've never used this service so I don't know if the user was being particularly clueless or if some dark pattern was at play; I suspect it's probably a little bit of both.

You knew what to look for, and were presumably logged into a device which showed you participants... now imagine if you were on the go, or not very technical so joined from a phone using a phone # and a meeting code... you'd never see it or be aware. I contend Otter knows exactly what they are doing and hopefully this lawsuit gets them to get a bit more transparent and law abiding.