I've just tried the google collab notebook implementation of stable diffusion which uses the huggingface model card and they've put in some form of censorship mechanism - using the following prompt, which I presumed was innocent enough:
the high priestess tarot card in style of silk screen by Austin Osman Spare, in style of Eliphas Levi, tarot card, art nouveau, woodcut, biomorphic, calotype, water damaged mildewed faded card, mouldy card, water stained paper, hellish, lovecraftian, grotesque, symmetry
resulted in the following warning
Potential NSFW content was detected in one or more images. A black image will be returned instead. Try again with a different prompt and/or seed.
I've used the same prompt on Midjourney and DALLE-2 without any finger wagging warnings...