they sound psychologically scarred to me. what delight would a child take in such an activity? if it proved authority wrong. so much emphasis is put upon physical violence. i can see a child revel in the fact that physical violence is nothing compared to emotional violence.
there was a commercial that used to run on TV(oh boy) whose message was, "words can hit as hard as a fist." i would say you are dealing with children who have been emotionally abused and they can find no relief for it. our society is emotionally abusive. it condemns whole ranges of human emotion as aberrant, even criminal. children are perfectly equipped to question these things yet inadequate in their ability to express their thoughts, especially in socially acceptable terms.
you cant keep thinking like you do and have any hope in understanding this phenomenon. it is obviously outside your world view. judgment should never be confined to simple condemnation and eradication of a behavior. imagine someone else having that power over what you think and feel and how you act.
remove the reason for the behavior and the behavior will cease on its own.