Usenet already offered this lesson: every user needs an immediately accessible killfile that can prevent them from seeing: - this obnoxious user, anywhere - t

Usenet already offered this lesson: every user needs an immediately accessible killfile that can prevent them from seeing: - this obnoxious user, anywhere - this obnoxious user, in this thread/group - this obnoxious user, using any of these keywords - any user using these keywords in this thread/group/anywhere Any social media system that doesn't offer these needs a much more expensive moderation system.