As a moderator of one of such forums, all of the behavioural issues have been a staple there too. We always had to moderate not just spam, racism and insults, but also "that dude that rants about his pet peeve in every topic", "that dude that rants over Apple even in topics where someone is asking how to change keyboard layout in macos", "that dude that's obviously mentally ill" and many others.

It was always a job of ensuring a comfortable environment for the community gathering on the forum and it did require "censorship" beyond obvious to prevent a minority of users from souring the environment for everyone.