High school - 1985 or 1986, I wrote an interpreter (in BASIC) that looked and acted like the BASIC we'd boot up off the shared drive (some odd TRS-80 networked set of workstations). The BASIC interpreter that I wrote worked mostly like the regular BASIC, but would give some random extra output. Came in to class early and booted everyone in to that BASIC, and watched as people took forever to type in their code, then run it, and have it not work - things like 5+7 came up as 3. The teacher was flummoxed, and we essentially wasted the class that day.
Looking back, it was quite a jerk move. I was trying to be clever (well, I was clever), but it didn't get me any more status with anyone - basically just reinforced the geek status I had (which wasn't a good thing to have in 1985). I was bored, but that's a pretty lame excuse. I think I ended up with a C- in that class ("intro to computers I"), mainly because I never flowcharted anything.
Looking back, it was quite a jerk move. I was trying to be clever (well, I was clever), but it didn't get me any more status with anyone - basically just reinforced the geek status I had (which wasn't a good thing to have in 1985). I was bored, but that's a pretty lame excuse. I think I ended up with a C- in that class ("intro to computers I"), mainly because I never flowcharted anything.