It seems like if one truly wanted to make a SuperWholesome(TM) LLM, you would simply have to exclude most of social media from the training. Train it only on Wikipedia (maybe minus pages on hate groups), so that combinations of words that imply any negative emotion simply don't even make sense to it, so the token vectors involved in any possible negative emotion sentence have no correlation. Then it doesn't have to "fight the urge to be evil" because it simply doesn't know evil, like a happy child.