thoughts on a monday

So what I wonder is this:

What is the connection between society and moral standards? It seems to me that with the absence of family and close friends quite a lot of people loose their entire structure of do's and don'ts. It makes me wonder if maybe this philospher I read last year was right; if you commit a crime, and no one knows you did it, then morally you are innocent, because in your society's eyes you have done nothing wrong. So as long as no one from home, no one important, knows of ones misbehaviours, appearantly; it's alright!