That's nothing. I just read about an angel who never did anything wrong and volunteered every Sunday reading for blind children, but was put in prison because he didn't have an alibi for a crime that was later shown to have been committed by someone else. Do you really think that he should have been enslaved in order to pay for the cage that imprisoned him?

edit: and about that guy who you mention. Do you really think that there's anything wrong with carving the names of his victims in his back, rubbing the wounds with salt and having him sexually abused by dogs? Wouldn't feel bad about that, right? Why draw a line anywhere if you're not going to draw a line at slavery?