The U.S. Department of Housing and Urban Development last week filed a formal complaint against Facebook for allowing its users to engage in housing discrimination via the Facebook advertising platform.

HUD claims Facebook enables advertisers to control which users receive housing-related ads based on the recipient’s race, color, religion, sex, familial status, national origin, disability, and/or ZIP code.

Facebook then invites advertisers to express unlawful preferences by offering discriminatory options, allowing them to effectively limit housing options for these protected classes under the guise of “targeted advertising.”

Read HUD’s complaint against Facebook. Read more about HUD’s complaint and see examples of Facebook’s alleged violations.