5S labelling can get silly. I have previously been required to put tape lines and labels on my desk to denote designated areas for "Mouse", "Phone", "Keyboard" etc.
The idea was that the engineers were complying with the same rules as Production.
I think the line was drawn at putting a tape line around the coffee cup?
I worked for Northampton branch of a Japanese 1st tier supplier to car industry and one of the managers had this on his desk. Every item divided up and placed in correct square (including drinks area). Of course being straight out of Uni I was very serious and hardly ever moved his curse word around when walking past.