While I don't doubt that an intent of this is to promote empathy, I would need to see some evidence before I could be open to the possibility that that is its effect. Anecdotally, these things seem to incense anger and hatred- I've never heard anyone say that being language-policed made them a better person, but I have seen people behave in a way that suggests the opposite. Personally, I become less empathic when someone assumes authority over what I say or write.