  Online harassment and content moderation have been well-documented in online
communities. However, new contexts and systems always bring new ways of
harassment and need new moderation mechanisms. This study focuses on hate
raids, a form of group attack in real-time in live streaming communities.
Through a qualitative analysis of hate raids discussion in the Twitch subreddit
(r/Twitch), we found that (1) hate raids as a human-bot coordinated group
attack leverages the live stream system to attack marginalized streamers and
other potential groups with(out) breaking the rules, (2) marginalized streamers
suffer compound harms with insufficient support from the platform, (3)
moderation strategies are overwhelmingly technical, but streamers still
struggle to balance moderation and participation considering their
marginalization status and needs. We use affordances as a lens to explain how
hate raids happens in live streaming systems and propose moderation-by-design
as a lens when developing new features or systems to mitigate the potential
abuse of such designs.
