Scans every library for sexually explicit content (strict: explicit flag or erotic genres/tags). Tick what you confirm, then tag it adult — nothing is moved and listening progress is untouched.
Last step — gate the tag per user (one-time, in Audiobookshelf)
Tagging doesn’t hide anything by itself. In Audiobookshelf → Settings → Users → open each user who should not see adult content (e.g. the Kids profile):
1. Turn off “Can access all tags”.
2. Set tag access to exclude the adult tag (in newer ABS: add adult to the selected tags and choose “Tags are not accessible”).
3. Save. That user can now use everything except adult-tagged items.
Your own admin account always sees everything. To undo a tag, re-scan, untick, or remove the tag in ABS.