A friend on Facebook posted a picture of a steel girder, with no apparent function, jutting into space from the side of a building. Stenciled on it in red letters were the words “do not use.” This was sufficiently absurd to motivate me to write the following: “Do not use” is an anagram for “desu noto,” or “death note” in Japanese. It logically follows that the words mean “Use the girder and you die.”