It seems to me that there is a confusion between two different types of law going on in this thread.
DESCRIPTIVE laws describe the way that the universe is. For example, Kepler's law of planetary motion states that planets move in ellipses. If it is no longer an accurate desciption then the law will be thrown out, and a more accurate one devised.
Scientific laws are descriptive.
PRESCRIPTIVE laws prescribe how things ought to be. Moral rules and the laws of a country are all prescriptive. The commandment "Thou shalt not murder" is prescriptive. It doesn't tell us whether there are, in fact, any murders. It merely tells us not to do them. And if someone does commit a murder, then we don't jettison the law. Instead the person gets punished.
Laws about DRM are all prescriptive. I'm not sure that it helps to compare them to descriptive laws, which are an entirely different category.
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