The difference between 60 years ago and today is the "culture" of the people. When everyone grows up in the same culture, they know what is acceptable and only a small minority cause trouble. For example, in Broken Hill we had explosives and guns everywhere, but it was not a problem. Then "outsiders" move in, not part of the culture, and in ignorance or indifference they do things that require regulation. We had an Asian visitor who shot sheep, and claimed he was just hunting like the rest who were shooting kangaroos. Multiculturalism requires much greater regulation, but that is not effective if the newcomers do not respect the regulations and their enforcers.