As far as class pranks go, this might be my favorite. A close second is all of the ones of people hiring choirs and bands to follow their principals around school.
Did your high school graduating class pull pranks? Ours had an annual tradition of covering the pyramid shaped utility shed that was in front of the school with graffiti. Every year it’d be spray painted, and then they’d paint over it with white paint. I’m sure if you picked at the flaking pieces, you can find graffiti going back to the 1950s when the school was opened.