This article by Barbara Ortutay, Associated Press, appears in PBS News Hour. Here is an excerpt:

Facebook failed to detect blatant election-related misinformation in ads ahead of Brazil’s 2022 election, a new report from Global Witness has found, continuing a pattern of not catching material that violates its policies the group describes as “alarming.”

The advertisements contained false information about the country’s upcoming election, such as promoting the wrong election date, incorrect voting methods and questioning the integrity of the election — including Brazil’s electronic voting system.

This is the fourth time that the London-based nonprofit has tested Meta’s ability to catch blatant violations of the rules of its most popular social media platform— and the fourth such test Facebook has flubbed. In the three prior instances, Global Witness submitted advertisements containing violent hate speech to see if Facebook’s controls — either human reviewers or artificial intelligence — would catch them. They did not.

Read the full story here.