It is quickly turning into one of these things that there are laws for, and everyone thinks it is rediculous, it is never enforced and DE facto not a law.
And what a shame that is.
US patent and copyright derive from A1S8C8 of the US constitution, "to promote science and useful arts".
Much EU law derives from a French tradition based on droight d'auteur, or moral rights.
International copyright code (Berne Convention) rips and mashes from both traditions.