By calling them stupid, you're being much too kind. A litter box outside in the snow ! I don't even want to think of where this poor kitty's food might have been, assuming there was any left for her/him. Because of your caring, kitty had a nice full tummy and the warmth of your love for those few hours. Don't be surprised if kitty calls to visit again. Please report this "person" to any and all authorities involved with animal welfare. This was blatant and intentional cruelty. Thank you for giving kitty help and comfort!!! And please let us know if he/she visits you again?