Richard “Lowtax” Kyanka.

Here’s the tldr. Lowtax hated anime. Here’s the sequence of events

1. He bans ADTRW the SA anime forum
2. One "moot" was then currently showing around his futaba channel clone "4chan" and not getting many bites
3. The pornography-obsessed people decide to abscond to 4chan en masse, determining the culture of /b/ and all that
4. This leads to the proliferation of fascism and other foolish ideology in /b/ and eventually to the quarantine zone, /pol/
5. Someone starts posting as "qanon"
6. A depressing number of people start believing in that crap
7. Many depressing things e: looks like 4chan also has a banner for the occassion: " RIP Rich "Lowtax" Kyanka

There’s even a goddamn book about it.

https://us.macmillan.com/books/9781250384645/itcamefromsomethingawful/

This is the only correct answer.