This article was in the paper the other day: http://www.smh.com.au/national/most-of-us-would-not-report-child-abuse-cases-20100904-14v6l.html.
It basically says that a large majority of people would not report child abuse if they became aware of it. It should surprise me yet it doesn't. I've seen how people conveniently turn a blind eye because they can't deal with conflict or are too afraid to impinge upon the sanctity of the family.
It really doesn't leave me much hope for humanity.