Several things you can do to these sick bastards.
1. burn those sick fucks at the stake
2. use medieval torture devices on them
3. feed them to ravinous wolves
4. use them as targets for either bows or guns
5. use them as practice dummies when you are using bladed objects
6. hang them and have a sword rung through their bellies
7. beat the hell out of them with heavy wooden katanas
8. put them in huge bronze statues of demons surrounded by a pull of water, then boil them alive
9. use them as crash test dummies
10. cut off their penuses, and make them live in a colony of eunics
I can go on with other things of that nature, but that's enough visual images for now.