You know how some options should never be considered unless they're proven to be absolutely necessary through things that have happened over an extended duration of time?
They realized that they had to do that last resort choice preemptively.
(If this makes no sense it's because it makes no sense)
I think the main instance being discussed there was explodingheads, which is a weird reactionary instance that I'm not exactly sure how to categorize, but there are also more straightforwardly 4chan ones like "postinglolirocks"