I'm not personally questioning it all. The point I was making was that such questions are fairly typical fare if you are going to get into moral philosophy.
For example, a very early question posed to me years ago (again in the context of a philosophical discussion) was that,
"If it could be proven that all car accidents would be prevented by strapping babies to the bonnet of cars, would that justify doing such a thing?" (or some such wording - I'm going back a loooong time here).
The whole question of personal freedom is a biggy in our culture and one that, generally, we all protect fiercely (think 1984 etc.) The reason it is such a hot topic these days, I think, is that we are moving far closer to a world whereby we could forfeit that freedom and anonymity (a lot has gone already of course). How do we live with that? Well, one way would be to be able to demonstrate a proven upside. So, if we could prove that wider use of CCTV would stop child abuse (as an example)would we, as a society, then embrace the loss of freedoms when, under normal circumstances, we find the idea abhorrent?
Or is our sociey ultimately made up of Xenias who feel that such freedoms must be protected above all else?
As I say, such questions are not new - and many people have expressed them through history far more eloquently than me.
The premise as it arose here is spurious though because greater use of CCTV is pretty bloody unlikely to prevent (or even reduce) child abuse - unless we stuck unbreakable cameras on everyone's head.