I'm kinda confused why people would consider the one with "local rapist" and "machine gun reviews" as accurate.
I have a few theories just for fun:
I also have a theory that there's actually more people not leaving comments at all than those who are leaving them. Like, massively more and we're actually the minority. So maybe commenters just suck. (<-that was a joke)
And there are people (like me) who actually leave comments on separate sites. For instance with Kaguya-sama and UQ Holder I mainly read/write comments on Mangahere because I like the tsukkomi system. So maybe more of the smart ones are on a different site!
Could be kids. It's not hard to just jump on a smartphone and check out the internet on wifi no matter what your age. You'd never know unless they specifically said it(the good ol' Youtube meme "I'm twelve!"). With all the quasi-ESL going around I wouldn't be surprised if some commenters were actually native and simply still learning English, maybe they are actually doing well for their age!
Last theory, maybe hyperbole caught hold of their heart and they think the TL is "abusing slang" and they weren't concentrating enough to grasp the reality that the TL might be suspect!
That's all I've got right now. P.S. Glad they made up, call me a yurifag but I think this wasn't quite GAY enough. But I'll settle for the fact that they are picking out each others' swimsuits.