Most people here could hack together some basic keyword searches for questionable content in a day at the outside. I think we can assume that Facebook already h

Most people here could hack together some basic keyword searches for questionable content in a day at the outside. I think we can assume that Facebook already has the tools to run those searches at scale and act on the results. So I don't think there's any good reason to disagree with you. At best, Facebook has prioritised "engagement" - i.e. ad revenue - over unacceptable extremism. At worst Facebook is knowingly complicit in the politics and in the polarisation that is being generated. It would be impossible to know which of those is true without access to internal records. But there should at least be an investigation asking these questions. And not just of Facebook, but of all the social tech and media giants.