The editors of the BMJ write an open letter to Mark Zuckerberg (archive) describing a failure of fact-checking. Among other things, the BMJ was called "a news blog".
There is also a wider concern that we wish to raise. We are aware that The BMJ is not the only high quality information provider to have been affected by the incompetence of Meta’s fact checking regime. To give one other example, we would highlight the treatment by Instagram (also owned by Meta) of Cochrane, the international provider of high quality systematic reviews of the medical evidence.[3] Rather than investing a proportion of Meta’s substantial profits to help ensure the accuracy of medical information shared through social media, you have apparently delegated responsibility to people incompetent in carrying out this crucial task.