There's a not-so-well known secret about 4chan that can't be glossed over when considering these kinds of things. On 4chan, there's 5-10 boards that are implic

There's a not-so-well known secret about 4chan that can't be glossed over when considering these kinds of things. On 4chan, there's 5-10 boards that are implicit "cancer filter" boards. These boards are used to curate the community and prevent undesirable users from leaking into higher quality boards. The cancer filter boards serve as the public face of 4chan; /b/, /v/, /mlp/, and a handful of other boards are used to divert the attention of the unwashed masses to prevent contamination of higher quality boards. Desirable users will start their 4chan experience on one of these cancer boards, come to the conclusion that they're low quality, and move on to a different, usually non-cancer filter board. Because of this filtering process, the demographics on each board vary wildly. Recently someone ran a statistical survey on several boards (n=~100/board) and found that the average age of users on cancer-filter boards was around 17-19, with the age increasing as you got to other boards. IIRC the average age on the niche hobbyist boards was between 23 and 25. What this means is that if you were to just remove /b/ tomorrow, all those angry violent users are just going to leak into the other boards, and turn them into another /b/. Now instead of one "problem" board, you have a dozen. The tldr here is that while most forum websites have a unified demographic across sub-forums, 4chan does not. Nuking the board won't get rid of problematic users, it will just displace them to another board.