Even then, it's easy enough now to have a second device capture the audio, like a phone as well. Being able to reflect on meeting notes is such a powerful valuable thing for people, you can assume they are almost certainly going to be doing it.
We already have products that provide active countermeasures against recording devices, an audio jammer of sorts that renders microphones unable to pick up anything. I wonder how effective they are.
Might be a German/European thing though...