Things like incest or harming one’s own kin are found in almost every "index" across history.
Databases of censored documents, leaked files, or restricted media. index of taboo
Digital libraries that host "taboo" literature—books that were historically banned by governments or religious institutions (like the real-life Index Librorum Prohibitorum established by the Catholic Church). The Real-Life History: Index Librorum Prohibitorum Things like incest or harming one’s own kin