[jagrsw]

Reminds me of the Orange Alternative movement in communist-era Poland. A group would wear t-shirts, each with a letter, spelling an innocent phrase.

When one turned away, the message would instantly become different, like changing "Down with the heat" to "Down with the cops" - https://sztukapubliczna.pl/pl/precz-z-u-palami-pomaranczowa-...

https://en.wikipedia.org/wiki/Orange_Alternative

the whole world is a work of art, so even a single policeman standing in the street is a work of art