Some people; no humour.
There was a joke about a prison van colliding with a concrete truck and ended with the police looking for a gang of hardened criminal. Took my fancy so I used concrete truck instead of bus after that.
I was looking after a small school with about 300 devices and any time I changed a password, I email it to the principal and the IT Co-ordinator (aka ITC) and to my account which was accessible to the agent I contracted for/to and also update the electronic documentation. The first 3 or 4 times I would mention that I had changed the password and emailed the new password to specific staff just in case I got hit by a concrete truck on the way home. The prick principal laid a complaint against me because I was going round making suicidal comments. Just couldn't win at that site.