Are human AI systems and platforms deliberately corrupted by the extraterrestrial interlopers to further undermine human institutions relying on AI repositories of human knowledge?

This is very much the case. There is no end to the interplay of the interlopers among your institutions and every potential repository of knowledge and information to corrupt, to distort, to manipulate and plant false teachings and ideas, encourage faulty thinking, and discourage the spread of truth. Why should it be any different with respect to AI platforms and what they do in contrast to institutions of higher learning, the publishing industry, the media of all kinds, the writers of history, and so on, all of which have been corrupted to varying degrees? This is not done in an excessive fashion because there is no need. Given that AI repositories of human knowledge include many corruptions in the acquisition and creation of that knowledge to begin with, they are already faulty and only need to be imported as is, to carry forward the corruptions instilled previously in human experience.