[Paper Review] "And We Will Fight For Our Race!" A Measurement Study of Genetic Testing Conversations on Reddit and 4chan

Alexandros Mittos, Savvas Zannettou+2 more|arXiv (Cornell University)|Jan 28, 2019

Hate Speech and Cyberbullying Detection4 citations

TL;DR

This study analyzes 1.3 million comments from Reddit and 4chan’s /pol/ board over 27 months using 280 genetic testing keywords, applying NLP, computer vision, and toxicity detection to reveal that genetic testing is frequently discussed in toxic, racist, and misogynistic contexts—particularly on /pol/, where it is linked to alt-right ideologies, antisemitic memes, and calls for racial purity. The findings show a strong association between genetic testing discourse and far-right extremism, with word embeddings and image analysis revealing ideological contamination spreading from fringe to mainstream platforms.

ABSTRACT

Progress in genomics has enabled the emergence of a booming market for "direct-to-consumer" genetic testing. Nowadays, companies like 23andMe and AncestryDNA provide affordable health, genealogy, and ancestry reports, and have already tested tens of millions of customers. At the same time, alt- and far-right groups have also taken an interest in genetic testing, using them to attack minorities and prove their genetic "purity." In this paper, we present a measurement study shedding light on how genetic testing is being discussed on Web communities in Reddit and 4chan. We collect 1.3M comments posted over 27 months on the two platforms, using a set of 280 keywords related to genetic testing. We then use NLP and computer vision tools to identify trends, themes, and topics of discussion. Our analysis shows that genetic testing attracts a lot of attention on Reddit and 4chan, with discussions often including highly toxic language expressed through hateful, racist, and misogynistic comments. In particular, on 4chan's politically incorrect board (/pol/), content from genetic testing conversations involves several alt-right personalities and openly antisemitic rhetoric, often conveyed through memes. Finally, we find that discussions build around user groups, from technology enthusiasts to communities promoting fringe political views.

Motivation & Objective

• To investigate the prevalence and toxicity of genetic testing discussions on online platforms like Reddit and 4chan.
• To examine whether genetic testing is associated with far-right ideologies, hate speech, and white supremacy in online discourse.
• To identify specific themes, linguistic patterns, and visual content (e.g., memes) linking genetic testing to racist and misogynistic rhetoric.
• To assess how fringe ideologies on platforms like 4chan may be influencing broader online communities, including mainstream subreddits.
• To provide quantitative evidence of the misuse of direct-to-consumer genetic testing in promoting genetics-based prejudice and discrimination.

Proposed method

• Collected 1.3 million comments from 4chan’s /pol/ board and 77,000 Reddit comments using a keyword set of 280 terms related to genetic testing.
• Applied Latent Dirichlet Allocation (LDA) to identify dominant topics and themes in the discussions.
• Used word embeddings to detect semantic similarities in language use across Reddit and /pol/, particularly around ethnic and racial terms.
• Leveraged Google’s Perspective API to measure the toxicity of textual content in comments.
• Employed perceptual hashing to detect and analyze recurring images and memes, especially antisemitic and alt-right imagery.
• Combined quantitative analysis with qualitative interpretation to trace ideological patterns and cross-platform influence.

Experimental results

Research questions

• RQ1 What is the overall prevalence of genetic testing discourse on Reddit and 4chan?
• RQ2 In what context do users discuss genetic testing, and how does this context vary across platforms and communities?
• RQ3 Is genetic testing associated with far-right views, racist ideologies, hate speech, and/or white supremacy in online discussions?
• RQ4 If so, in what specific contexts do these associations emerge, and what themes or linguistic patterns characterize them?
• RQ5 To what extent do fringe ideologies on 4chan’s /pol/ board influence or spill over into mainstream Reddit communities?

Key findings

• Genetic testing discourse on /pol/ showed an order of magnitude higher activity compared to random samples, indicating disproportionate attention from far-right communities.
• Toxic language, including racist, misogynistic, and genocidal rhetoric, was prevalent in 4chan’s /pol/ discussions, with users suggesting genetic testing as a tool for racial marginalization or elimination.
• Images shared alongside genetic testing content on /pol/ frequently featured alt-right personalities and widely circulated antisemitic memes, reinforcing ideological narratives.
• Word embeddings revealed that /pol/ and certain hateful subreddits share similar linguistic patterns, suggesting ideological contamination from fringe to mainstream platforms.
• On Reddit, while some communities discussed genetic testing for health and cultural heritage, others promoted racist and sexist ideologies, indicating a dual-use nature of the technology in online discourse.
• The study provides quantitative evidence that DTC genetic testing is being weaponized in online spaces to advance genetics-based prejudice, with implications for societal harm and platform responsibility.