That is SO COOL!
If your printer is not protected, someone can send something to it. There is a hilarious story that I can’t find right now about a guy who hated his obnoxious neighbors and every so often he would make their printer print several nonsense pages about chickens. They would go nuts wondering why that was printing again..
If I can find it, I’ll post it.
https://www.improbable.com/airchives/paperair/volume12/v12i5/chicken-12-5.pdf
Here’s a link to the chicken document.