You can't mandate that everyone shares your ideals. You can't force everyone into an education to teach them those ideals. Choice is the ideal of libertarians.
People always have the choice to do wrong, and people will always have the choice to stop them. A world without choice, is a world worse for everyone.
This never changes. What changes is illustrating to people (who care to learn) how much of their life is wasted in Harm and how they can re-utilize that for more fun.
Socialism, Fascism and communism are about removing choice in the individual and trusting it to a higher authority, whether it be society or the government.