The reason I make fun of Elon Musk is because of his belief that taking one principle, freedom of speech, to the extreme would work in the real world. Humanity has been working for millennia to find equilibrium between extremes...
But every now and then some smart ass comes along with an extreme ideology and screws everything up. Whether it's communism or libertarianism, crusades or jihad, it always ends in a lot of suffering and bloodshed. Ideology is a brain disease.
@BartoszMilewski who's to say we're not at an extreme now, in our market-liberal capitalist world? Where when a muskrat shuts down a big piece of daily life and public safety, we just say "he shouldn't do that" and move on? In feudal times they believed themselves to be between the extremes as well, but now we would easily say serfdom is extreme.