I do hope he didn't do anything horrid to any of our pupils while he was at our school preparing and rehearsing his show.

This all hangs on the age-old question of how much is anyone responsible for their own actions. If a person takes pleasure in perversion, and cannot seem to control this, are they guilty, or sick? And should they be punished or treated? I've always found this difficult. If one subscribes to the 'not his/her fault' idea, then practically no punishment would ever be meted out. All deviance from the acceptable could be seen as mental incapacity. How far is anyone able to control their basic animal urges? And if they can't, then why not? But society needs to be protected from such people. And custody IMO is needed. However, they'll be 'let out' eventually won't they?
The current Pistorius trial hangs on the same problem of culpability. I've never sorted this type of thing out in my head.