What benefit to society do you think torturing someone can possibly have?

Do you think that the people watching and shouting encouragement and throwing fruit or whatever become better or worse people as a result of participation in such an act, or do you think that they are doing exactly what he did "i will teach that puppy a lesson for biting and shitting all over the place" followed by "i will teach that kid a lesson for hurting that puppy" what lesson do you think someone can learn if they are just about to die and never get a chance to learn from it?