Was this supposed to be 2chan or something?

No, it's clearly gaia online.

I think that's Reddit

Looks like yahoo news comments

Boku no runescape forums

It's clearly the hacker known as 4chan.

Could be ebaums.

What about Usenet?

Keep in mind that the manga is only about 5 years old.

>>155001792
Is that impressive or not?

>>155001943
Nah I was just providing a frame of reference for what the forum could be.

4chan is much, much bigger than 2ch or any other spinoff site, so if it's anything it's 4chan.

>>155001496
Seems those people are still doing fine.
https://groups.google.com/forum/#!topic/rec.arts.anime.misc/E_N6g2MCdvg

>>155001151
It's pretty clearly digg.

>>155003527
Yeah but I figured it was 2chan since it's made in Japan, obviously, and because the text is in Japanese.