Facebook said on Thursday it was temporarily disabling the ability of advertisers to target based on people's self-reported education and job information after a report that those features allowed targeting based on anti-Semitic topics.
ProPublica, a non-profit news organisation based in New York, reported hours earlier that Facebook's self-service ad-buying platform had allowed marketers to target ads at people who, on their Facebook profile, had listed phrases such as "Jew hater" as their field of study or work.
About 2,300 people had expressed interest in the topics "Jew hater," "how to burn Jews" and "History of 'why Jews ruin the world'," according to ProPublica's investigation.
Facebook, the world's largest social network, confirmed the ProPublica investigation.
Once people put those phrases on their Facebook profiles, the anti-Semitic topics automatically migrated onto the company's advertising platform, as if they were education or job data that would be useful to marketers, Facebook said.
"We are removing these self-reported targeting fields until we have the right processes in place to help prevent this issue," Facebook said in a statement.
"We want Facebook to be a safe place for people and businesses, and we'll continue to do everything we can to keep hate off Facebook," it said.
Facebook initially responded to the ProPublica report by removing the topics in question from its ad system.
However other news reports, including from Slate magazine, then discovered that hateful topics were more widespread in the ad system's targeting capabilities.
Last year, ProPublica reported that Facebook allowed advertisers to exclude users by race when running housing or other ads, despite a prohibition on such ads.
Facebook said last week an operation likely based in Russia spent $100,000 on thousands of US ads promoting social and political messages over a two-year period until May, fueling concerns about foreign meddling in U.S. elections.
The company said it shut down 470 "inauthentic" accounts as part of an internal investigation into those ads.
