Title

The Social World of Content Abusers in Community Question Answering

Document Type

Conference Proceeding

Publication Date

2015

Digital Object Identifier (DOI)

https://doi.org/10.1145/2736277.2741674

Abstract

Community-based question answering platforms can be rich sources of information on a variety of specialized topics, from finance to cooking. The usefulness of such platforms depends heavily on user contributions (questions and answers), but also on respecting the community rules. As a crowd-sourced service, such platforms rely on their users for monitoring and flagging content that violates community rules. Common wisdom is to eliminate the users who receive many flags. Our analysis of a year of traces from a mature Q&A site shows that the number of flags does not tell the full story: on one hand, users with many flags may still contribute positively to the community. On the other hand, users who never get flagged are found to violate community rules and get their accounts suspended. This analysis, however, also shows that abusive users are betrayed by their network properties: we find strong evidence of homophilous behavior and use this finding to detect abusive users who go under the community radar. Based on our empirical observations, we build a classifier that is able to detect abusive users with an accuracy as high as 83%.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Proceedings of the WWW '15: 24th International World Wide Web Conference, May 18-22, 2015, Florence, Italy

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