It doesn’t happen any more because I don’t work there ;)
But I have done that, because I think that’s the way to handle it. And been met with huffing, flouncing, ‘ooo does she think she is’ kind of shit etc. In response to a polite ‘on the phone’ mouthing.
There’s noise in open plans - I’d be mortified if I’d ever felt I was annoying people. A LOT of folk don’t seem to see that. They just need to have a direct line between their thoughts and their mouths.
I hated open plan. Hated it. Used to work in a lab which was of course open and no issues, but that office just made me so on edge all the time. Constant, pointless, yammering and yapping and gossiping. No quiet, no respect for people’s space or time or need to concentrate. So stressful.
There’s actually work done that shows that with the exception of a very few types of work, open plan performance is worse on almost all metrics: efficiency, productivity, employee happiness, transmission of illness - everything.
It suits a certain type of person. I am not that type.