I had my ways of getting even - but violence!
The way I did it - well, I has a computer with a modem that young (and most didn't know what one was yet - it was actually a kit me and my dad built) - while the general public didn't know much if anything about them yet - a lot of businesses did have a phone line that was answered by a modem. - I just used a "WarGames dialer" to search for computers in the area of the business that printed the report cards - let's just say my fingers get pretty itchy when that time started getting close!
(Also might have been handed in, but never actually did any of those write something x amount of times times - a code did it something like:
10 Line input "Phrase: "; a$
20 Input "Count"; c
30 Open "lpt1:" for output as #1
40 for i=1 to c
50 print #1, a$
60 Next i
80 close #1
90 end
And since it was not an actual printer, but a tele-type hooked up as a printer - it looked like it was all actually typed!
)