Characterized by or favoring absolute obedience to authority, as against individual freedom.
...which is entirely compatible with enforcement of high-pressure, in-group norms. Shunning is an authoritarian practice, even if it’s done by a collective. See also the Cultural Revolution in China.
So what would happen? You would get punished for causing inconvenience to a person who had a right to hang their washing on that day? Sounds very reasonable, how is that authoritarian?
I'm sure you could create a political movement to make it by law easier to hang out your washing where you like.