This is a bigger deal than “horny is banned”, sadly. I’ve got text posts that are completely clean blacklisted from my own damn blog search; the same for art, just based on pixel groupings and a few buzzwords.
Censorship Is a Slippery Slope, especially when it’s done by computers, even moreso when the people behind the computers are the monumental dumbasses that run this site.
Tumblr User: Horny is illegal! Ha ha!
Tumblr staff, banning that user because they posted a picture of their golden retriever that contained too many “flesh-colored” pixels: Horny is illegal.