Facebook Housing Ads Enabled Racial Discrimination Through Targeting System

In October 2016, ProPublica revealed that Facebook's advertising platform allowed advertisers to exclude users from seeing housing and employment ads based on race, ethnicity, religion, and other protected characteristics. The investigation demonstrated how advertisers could use Facebook's "Ethnic Affinities" targeting feature to exclude groups like "African American," "Asian American," and "Hispanic" from seeing housing advertisements, directly violating the Fair Housing Act of 1968. The discrimination was not limited to explicit exclusions. Facebook's machine learning algorithms amplified these biases through lookalike audience features, where the platform would automatically find users similar to those in targeted or excluded groups. This meant that even when advertisers did not explicitly exclude protected groups, the algorithm would learn discriminatory patterns and perpetuate them across broader audiences, effectively creating digital redlining. Following the ProPublica investigation, the Department of Housing and Urban Development (HUD) filed a complaint against Facebook in March 2019, alleging systematic violations of the Fair Housing Act. The complaint detailed how Facebook's advertising tools enabled discrimination not just through explicit exclusions, but through zip code targeting that correlated with racial demographics and through algorithmic optimization that learned to exclude protected groups even without explicit instruction. In June 2022, the Department of Justice announced a landmark $115 million settlement with Facebook (now Meta) to resolve the discrimination claims. Under the settlement terms, Facebook agreed to stop using an algorithm that the DOJ said discriminated against users based on protected characteristics. The company also committed to developing a new system for advertising that would prevent discrimination in housing, employment, and credit advertisements. Additionally, Facebook agreed to pay the maximum civil penalty allowed under the Fair Housing Act and fund programs to increase access to housing opportunities. The settlement required Facebook to implement significant technical changes, including the creation of a new advertising system called the "Special Ad Audiences" tool for housing, employment, and credit ads. This system limits targeting options and uses machine learning to ensure ads reach diverse audiences regardless of advertiser preferences. Facebook also agreed to conduct regular civil rights audits and submit to ongoing monitoring by an independent third party to ensure compliance with fair housing laws.