Really, the big problem are the instability from ripple effects. How will the world react to massive migrant crises and new, more intense conflict? To increasing economic recessions and the breaking away of old privileges? All things we are already seeing and that won’t go away anytime soon.
Now, total extinction of the species, yeah, that is very unlikely, unless something really unexpected happens. But throwing us potentially back centuries in progress, and killing a majority of people? A nuclear exchange from escalating tensions could create something like that.
Yeah, that was clearly just the group having fun, sounds like it might have been some kind of in-joke. Stuff like keygen music and adding extra fun stuff to your cracks has always been part of the culture. For the most part, while I’m not saying there is zero risk, but as long as it’s from verified groups with good reputation, your pirated software will be safe to use - also part of the culture.