Actually, if in the US, all work places have to keep accurate records of work place accidents. From OSHA regulations "make periodic reports on, work-related deaths, injuries and illnesses other than minor injuries requiring only first aid treatment and which do not involve medical treatment, loss of consciousness, restriction of work or motion, or transfer to another job."
So if you decide to stand on your chair to hang up a photo, loose your balance, fall and break your ankle, your university has to record and report that accident.
Working in an office but for a engineering and construction company, I'm so used to seeing safety signs and other notices (we have safety signs for proper use of escalators and changing copy machine toner cartridges) I wouldn't see it as ironic. I'd see it and and wonder "huh, wonder what happened." But if it was set to zero and maybe a cartoon character with a bandaged finger, I might see it as humor.
Anime, I like your poster.