I ah… ummmm wait, whut?
*** TRANSLATION FOR OPPIEJOE AND OTHERS ***
(assuming that I understood it correctly myself. . .)
“I heard that you can be on one computer, and make a printer connected to somebody else’s computer print things. How do you do that?”
My answer: I dunno the details, but you’d probably need to have your computer and their printer connected in some sort of a local network. I doubt that you can simply take over somebody else’s printer simply by using the Internet. If you can, I doubt that it’s all that easy. . .or that legal.
The only real computer prank I can recall offhand that I ever did was to open up the image file that they have as a desktop, draw something on it like a folder or an error message, set that newly modified image as their desktop, and then watch them get all frustrated trying to click on the “folder” that’s on their screen.