"I do stand by the troll comment in the context of the opening post re a surveillance society." hmmm, pot calling the kettle black? A bit of thought police perhaps? Trying to control who can comment on a topic of interest? This thread is very relevant to crime in our society.
Easy to make these "moral" arguments from the comfort of your armchair and when you have never been in a position where you might need to rely on a CCTV to save your life, or protect a loved one or to prove a case against a rapist or worse.
So Jill Meagher is one of the sacrificial lambs that are required for your argument to stand?
I guarantee you'll forget your moral ideology if faced with the situation personally.
If we lived in a perfect world, with minimal crime, you'd have an argument, but, sorry, news for you...we don't.