> Making something illegal influences social norms. It signals that something is "bad" and for "bad people."
This is often used by totalitarian governments. It leads to "Preference Falsification," an idea developed by Timur Kuran.
Making something illegal for social reasons also degrades each person's sense of autonomy and self-governance. It invites jurisdiction within one's private sphere by removing each person's duty of "Obedience to the Unenforceable." Below is a key description from John Fletcher Moulton's article about it and links to an excellent Econtalk podcast discussing the idea.
Preference falsification is the act of misrepresenting a preference under perceived public pressures. It involves the selection of a publicly expressed preference that differs from the underlying privately held preference (or simply, a public preference at odds with one’s private preference). People frequently convey to each other preferences that differ from what they would communicate privately under credible cover of anonymity.
https://en.wikipedia.org/wiki/Preference_falsification
Follow me in examining the three great domains of Human Action. First comes the domain of Positive Law, where our actions are prescribed by laws binding upon us, which must be obeyed. Next comes the domain of Free Choice, which includes all those actions as to which we claim and enjoy complete freedom. But between these two there is a third large and important domain in which there rules neither Positive Law nor Absolute Freedom. In that domain there is no law which inexorably determines our course of action, and yet we feel that we are not free to choose as we would. The degree of this sense of a lack of complete freedom in this domain varies in every case. . . . it is the domain of Obedience to the Unenforceable. The obedience is the obedience of a man to that which he cannot be forced to obey. He is the enforcer of the law upon himself . . .
https://www.econtalk.org/michael-munger-on-obedience-to-the-...
https://aleteia.org/2016/04/11/how-an-expert-in-blowing-thin...
https://en.wikipedia.org/wiki/John_Fletcher_Moulton,_Baron_M...
https://www2.econ.iastate.edu/classes/econ362/hallam/Newspap...