Historically, mockery is also the best weapon against authoritarianism. It demonstrates that the state can’t control every aspect of citizens’ lives, especially their beliefs and attitudes. And if the state attempts to exert control, the mockery can be moved towards the subtle, forcing ever-more ridiculous actions like banning people from holding blank sheets of paper (China, UK). This demonstrates weakness, which encourages others to join.
In China at least, the blank paper protests were successful in making the government loosen up its extreme “zero-COVID” policies (welding shut the gates of apartment buildings, sealing off cities, etc).
Historically, armed conflict has proved to be the best weapon against authoritarianism, not mere mockery. The American Colonies had to fight a war to gain independence from Britain. The Third Reich was defeated by Allied soldiers. The Japanese emperor was defeated by nuclear bombs. Dictators in Algeria, Cuba, Vietnam, Angola and Mozambique, and Libya were all toppled by armed uprisings--the list goes on.
The "blank paper protests" might have been effective at persuading the Chinese government to undo some measures, but that government is no less authoritarian and repressive than it ever was.