Free-software development is meant to be fun, at least some of the time.
Even developers of database-management systems seem to think that it is
fun; there is no accounting for taste, it seems. Part of having fun is
certainly allowing the occasional exercise of one’s sense of humor while
working on the code. But, as some recent “fix” attempts show, humor does
not always carry through to developers all over the planet. Balancing
humor and inclusiveness is always going to be a challenge for our community.

Source: LWN.net – [$] Code humor and inclusiveness