Comment Pranked a computer in high school using Turbo C++ (Score 1) 231
When in high school, I wasn't in any of the computer programs they had but I was on my own a bit of a tinkerer and was busy learning Borland Turbo C++ at home. At school I'd dink around with the computers in the lab (386sx16's) which were also being used to teach Turbo C++. I wrote a program that made a low sound for several seconds and then said "Oh, sorry, I couldn't control myslef!". I setup the autoexec.bat to run it and then restore the original version of autoexec.bat. I didn't get in trouble because they could not prove it was me, but I did piss off the teacher (another student, ironically) of the class. They let me play with the computers at lunch only if I promised not to mess with them anymore. I complied.
Another time a guy gave me an old heathkit oscilloscope and I really didn't know what to do with it. I wish I did! But anyway I hooked the leads to a 72mhz RC transmitter and turned it on. As I was watching the patterns on the scope, I heard every car alarm in the neighborhood going off. I later realized that a harmonic must have been strong enough to interfere with alarms. That was pretty fun