I too run an AI Art Generator based on VQGAN+CLIP - https://creator.nightcafe.studio/text-to-image-art

NightCafe has a feed of artworks, and I too was getting a lot of NSFW or very distasteful prompts. I just used an npm package to detect 'naughty words' to auto-flag any distasteful ones as 'needs moderating', where I can then manually approve or reject them.