A few minutes ago, I posted a new issue to the github and decided that if I also mention it here on the forums, it could gain some more traction. In its basics, it is about why the current "moderation" permission node sucks, and what is should be.
Here it is in all its vain and glory:
https://github.com/NodeBB/NodeBB/issues/3914

@julian That what I as thinking, sadly Google decides to keep us in the dark about the specifics of how it works. Although, I believe that is how it works, by analyzing your mouse movements and such, and I am VERY happy to see reCaptcha's going away -- hate those things :C

Winky winky linkie to an issue posted on the github