Soviet standing in red square handing out blank pieces of paper.
Police come, and tell him to stop distributing protest flyers.
Protestors: Protest? they're blank paper!
Police: Comrade, everyone knows what's wrong.
I might have messed it up a little, but, you get the gist.
Russia arrested anti-war protesters holding blank signs: https://www.newsweek.com/russia-ukraine-war-invasion-protest...
But apparently this a thing in many countries, and there's even a Wikipedia article about this form of protest: https://en.wikipedia.org/wiki/Blank_piece_of_paper
Ah, to be in America:
>In 1970, Anna Halprin organised a "Blank Placard Dance" by members of her San Francisco Dancers' Workshop. They paraded, dressed in white, while holding blank placards. She explained, "...there were so many protests going on and this way each person watching us could just imagine whatever protest slogan they wanted on the placards."
It's nice to be able to protest with blank signs because you want to make a joke, and not because of fear of arrest.