It is the principle behind all government. In fact it is not much more than a basic description of the concept of a government. Your government bans stuff too, I guarantee it.
No fantasies here, the state does plenty that I disagree with. But the idea that societies can regulate harmful conduct is not really that controversial outside of HN and a few other particularly libertarian bits of the internet.
It's certainly the principle behind most governments. But not all. The one shining exception is the United States of America. That government was founded on an entirely different principle, the principle of individual rights. This principle says that man, due to his nature, has rights that no one else, not even his government, is allowed to violate. These rights are not granted and revoked by government, but protected by it. And if the government violates those rights in a significant way, it is a person's duty to overthrow that government. This was a truly radical position in 1776. Unfortunately, it is still radical today, and little understood.
If you'd like to learn more about this, google the "Declaration of Independence" or "The Rights of Man" by the philosopher John Locke.
> That government was founded on an entirely different principle, the principle of individual rights. This principle says that man, due to his nature, has rights that no one else, not even his government, is allowed to violate.
That's far from a uniquely US principle. See, for example, the European Declaration of Human Rights.
The US places more emphasis on individual rights over the rights of the community, which is its prerogative, but the US is an outlier; most liberal democracies accept a little more restriction on individual rights for the good of the community.
You can argue it either way, but a lot of US commentators seem to get outraged that other countries might have a different viewpoint.
No fantasies here, the state does plenty that I disagree with. But the idea that societies can regulate harmful conduct is not really that controversial outside of HN and a few other particularly libertarian bits of the internet.