The "anti-porn" filter will of course be bogus, just like the police dogs that can "sniff out" porn: <a href="https://ca.news.yahoo.com/utah-police-introduce-porn-sniffing-1457844147707958.html" rel="nofollow">https://ca.news.yahoo.com/utah-police-introduce-porn-sniffin...</a> which are also from Utah, and suggest a trend or the presence of a vein of something.<p>These efforts all fail, mainly because there's no definition of porn other than "I know it when I see it", much less an algorithm to detect porn. You can cite Rigan Ap-Apid's "An Algorithm for Nudity Detection" (<a href="https://www.researchgate.net/publication/249767252_An_Algorithm_for_Nudity_Detection" rel="nofollow">https://www.researchgate.net/publication/249767252_An_Algori...</a>) but nudity is a good deal different than "porn", and Ap-Apid's algorithm doesn't actually work well.