"I didn't get banned for this because I never got caught until I ratted myself out. In my Computer Science class, I managed to find every printer in the domain on campus. I went browsing through them all seeing as they were all named by their classroom number and not which teacher until I came across gold. ROTC Printer 1. At the time, my girlfriend was in ROTC and she was always saying the Colonel was a nice guy, so being the jerk I am, I decided to mess with him.
Every day during my Computer Science class, I would find a random picture online and send it to his printer with his name on it and some messages.
Fast forward to graduation, the Colonel was there shaking hands with every graduate and I walked up to him and asked him if he liked the pictures. The look on his face was priceless. He just sat there and muttered, 'You son of a...' and started to laugh. He had told me he was going crazy because it would print at the exact time every day. He also taught a class that period in the room and he said it creeped his class out. He applauded my dedication to the prank as I did this from day two of Computer Science class to the end of the year, which was the year I graduated. My girlfriend at the time was clueless and turned out she was in that very same class that I sent the pictures too. That one didn't turn over well."