Sending threats to the uploader is not the way to go, but what the uploader did is both legally questionable and disgusting.
If any other NLP and ML engineers are reading this and are siding with the uploader... please take a good look at your life choices. Just because you can, doesn’t mean you should. This isn't some heroic act of open-source principles or “sticking it to the man”; it's punching down. You're in one of the cushiest, best-paid professions, you have everything, and you still want more.