It's amazing to me, with what little expertise I have in psychology (but no formal training) its obvious how damaging this kind of group negativity can be. https://www.researchgate.net/publication/222829420_Mood_and_... has links/citations to lots of the relevant, more in depth research on specific aspects, from mood contagion, to the effects of mood on judgment and decision making.

I do wonder what percentage, if any, of the "great resignation" is due to individuals reaching the bottom of a slow negative spiral of emotions connected to their work environment, these kinds of things happening at the office would likely profoundly accelerate/tighten that spiral...