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Do Platform Migrations Compromise Content Moderation? Evidence from r/The_Donald and r/Incels

Horta Ribeiro, M; Jhaver, S; Zannettou, S; Blackburn, J; Stringhini, G; De Cristofaro, E; West, R; (2021) Do Platform Migrations Compromise Content Moderation? Evidence from r/The_Donald and r/Incels. In: Proceedings of the ACM on Human-Computer Interaction. (pp. pp. 1-24). ACM Green open access

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Abstract

When toxic online communities on mainstream platforms face moderation measures, such as bans, they may migrate to other platforms with laxer policies or set up their own dedicated websites. Previous work suggests that within mainstream platforms, community-level moderation is effective in mitigating the harm caused by the moderated communities. It is, however, unclear whether these results also hold when considering the broader Web ecosystem. Do toxic communities continue to grow in terms of their user base and activity on the new platforms? Do their members become more toxic and ideologically radicalized? In this paper, we report the results of a large-scale observational study of how problematic online communities progress following community-level moderation measures. We analyze data from r/The_Donald and r/Incels, two communities that were banned from Reddit and subsequently migrated to their own standalone websites. Our results suggest that, in both cases, moderation measures significantly decreased posting activity on the new platform, reducing the number of posts, active users, and newcomers. In spite of that, users in one of the studied communities (r/The_Donald) showed increases in signals associated with toxicity and radicalization, which justifies concerns that the reduction in activity may come at the expense of a more toxic and radical community. Overall, our results paint a nuanced portrait of the consequences of community-level moderation and can inform their design and deployment.

Type: Proceedings paper
Title: Do Platform Migrations Compromise Content Moderation? Evidence from r/The_Donald and r/Incels
Event: ACM on Human-Computer Interaction
Open access status: An open access version is available from UCL Discovery
DOI: 10.1145/3476057
Publisher version: https://doi.org/10.1145/3476057
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/10139708
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