Someone sat right behind me in co-working and started having an online meeting, out in the open because we all want to hear about it of course. I just did some subtle turning around (no direct eye contact) with body language communicating “what’s that annoying and distracting sound that I suddenly hear”. Within a few minutes he moved into one of the sound proof booths. I’m getting very good at communicating my annoyance at people with no office etiquette in ways that don’t involve any words. 😇