Being rude when unnecessary, is a cry for help. No one that feels good will go out of their way to provoke a negative reaction in others. That mere lack of boundary is your first indicator that they don't feel well.
Microsoft in Japan trialled a 4 day working week and saw an increase in productivity of 39.9% and decreasing electricity and paper usage. 92% of the 2,300 employees who took part in the trial enjoyed the 4 day week.
It's about time workers are rewarded.