[spawarotti]

I think it is fair to not spend time and resources engaging with such ideas, as long as there is a good "decision record" documentation explaining that this subject was already discussed, decisions were made, and there is no point coming back to it. Same as with flat Earth - have some documentation thoroughly debunking the idea and point to it anybody trying to start the conversation again. Tell them they need to first read through all of it. If they are still not convinced after that, they are free to lay out their argument, but it is on them to make the argument strong, which should be, like, really hard, given the plethora of evidence we have that Earth is not flat.

In the examples you gave the "decision record" would be fairly simple - we assume that human rights [1] are a given.

[1] https://en.wikipedia.org/wiki/Human_rights