They land wherever they want, scold anyone nearby, and defecate on everything. Managers do that, too. At least with this technique they're gone most of the time and employees can get some work done. This technique demands a lot of cleaning up. Grow mushrooms .
Mushrooms grow well in the dark and when fed detritus.
Some managers think that's the way to treat employees. Well, at least it's warm in the mushroom caves. Throw me a curve. Carl Friedrich Gauss knew a lot about math, but nothing about management. Lots of managers figure employees should fit Gauss' distribution.