When commercial sites started using BSD (fondly known by some of us as Berzerkeley Unix), some (*ahem*) managers pruned the "tunafish" joke out of tunefs(8)'s manpage. In SunOS 4.1.1, it had been reinstated, together with a comment in the source: "Take this out and a Unix Demon will dog your steps till the time_t's wrap around." We take our jokes seriously.

.... My favourite bit in the BUGS section of a manpage (which I can no longer find) was: "This is a very small candle attempting to illuminate a large, dark problem." Fifty bonus points to whoever rediscovers it for us all.