Make suggestions and make them funny.
  1. Here is the actual sign I saw in an office:
    504091 3baff8ec abea 4b35 9825 32dadf79e083
  2. Bend with your knees and not with your back!
    Suggested by @lesleyarfin
  3. Do not consume random square boxes found on the ground. It may result in explosive diarrhea.
    Suggested by @eatthelove
  4. Zeus said no boxes!
    Suggested by @maria