alt Hacker News> to take his or her own life with a sword [commit seppuku] upon failure to uphold any of the pledges in this license
This is obviously a joke, not a legally binding "suicide pledge". Signing this is a culture fit test and did its job at filtering out people like this Karen.
"Oh, that bit was just a joke" in a legally binding contract invites the question of what other bits were, which isn't a conversation you want to have in court.