>>That would only address the symptoms. We need to attack the cause of the problem. Ban sex!
>
>But sex was mostly banned for the most of the last twenty centuries. There were only a few situations when it was allowed (marriage when sanctioned by a religious authority, and rape by conquering army). I don't see how it helped.

As I recall reading, there wasn't such a problem of children not being taken care of by their parents back then. Orphans (and everyone else captured by the conquering army) were turned into slaves so they didn't have any time or freedom to get into trouble.