1) Brutal people 2) Crossword editors, some say 3) Cruel bunch 4) Cruel people 5) Dentists to some 6) Dominatrices 7) Followers of the marquis 8) Lovers of cruelty 9) Mean ones 10) Ones who are hurting 11) Pain inflicters 12) People who revel in cruelty 13) Punitive persons 14) Puzzle makers, so it seems 1) Hurters