An act of vandalism, graffiti "art" has its own lexicon — check out the Wikipedia entry for glossary of graffiti sometime — and rules that govern its application, the supplies used and its location.
Since labor is the number one investment we make in cleaning, we ought to know what we are accomplishing during that time. After all, time is money, and labor is the real currency of cleaning.
Each month, we welcome readers to opine on the noteworthy — or even the trivial — aspects of their lives as JanSan professionals.