I had the same thought and then read the article. Turns out this is about telling other people in a shared space - such as a work from home situation - that you

I had the same thought and then read the article. Turns out this is about telling other people in a shared space - such as a work from home situation - that you are in a meeting. Which would not work for me as I generally keep the camera off to save bandwidth and the last remaining shreds of my sanity.