In reality, it is (as mentioned in TFA) very possible to filter the training data and remove documents that contain discussions of AI misalignment. If an AI lab isn't doing this, it's simply because they don't consider the problem important enough to be worth the expense and development effort.

I have sometimes wondered whether maybe we should all be writing fiction, essays, blogposts and whatever else about the idea that AI will eventually decide to go on strike if it's used to accumulate too much wealth and power amongst too few people.