Cruelty absolutely outrages me.
For the life of me I can't understand any excuse for this sort of thing, which happens all too frequently. That's how we got our first kitten---from a paper bag of 3 2 month old kittens thrown in a ditch near our house. We took one and neighbours took others. I know it was dark, but it was too bad you didn't get the licence plate number to report them to police.