Also, part of my purpose was to look at people's views on "justice". If they're not in prison or being executed, are they being punished? Are they getting away with it?
I think the criminal "justice" system ideally should have two goals.
1.) Rehabilitation.
2.) If rehabilitation does not work - removal from society to protect those they would prey on.
I don't think "punishment" or revenge are effective in any way, nor should they be a part of any justice system.
Given this, I think banishment is certainly an acceptable option.
All that said, I recently started a thread on how I would like to see the derranged filth who prey on children killed. (the story was about a woman and her boyfriend selling her young daughter off as a sex slave in exchange for a used car, an apartment and childcare for their infant, which they were planning on selling into the sex trade industry as well) I'm human.