Never has a Huxley quote been more in order.
“That so many of the well fed young television-watchers in the world’s most powerful democracy should be so completely indifferent to the idea of self-government, so blankly uninterested in freedom of thought and the right to dissent, is distressing, but not too surprising. “Free as a bird”, we say, and envy the winged creatures for their power of unrestricted movement in all the three dimensions. But alas, we forget the dodo. Any bird that has learned how to grub up a good living without being compelled to use its wings will soon renounce the privilege of flight and remain forever grounded.”
― Aldous Huxley, Brave New World Revisited
451 Unavailable For Legal Reasons (Internet draft)
Defined in the internet draft “A New HTTP Status Code for Legally-restricted Resources”. Intended to be used when resource access is denied for legal reasons, e.g. censorship or government-mandated blocked access. Likely a reference to the 1953 dystopian novel Fahrenheit 451, where books are outlawed.