OLE and MS Office were very valuable allies back then ;)
At least we've moved beyond this level of naivety these days.
This primarily consisted of a single SPARCstation with SunOS 4.x. and a bunch of VT320 terminals (and a few IBM ones). I was in grade school, there were high schoolers here and there and mostly people in college using systems for primarily IRC and gopher.
I was learning C at the time and heavily into graphics programming so I wanted to use as much system resources as possible - which of there weren't many. So I had this cunning plan where I wrote a simple (I was grade school) C program that basically malloced as much memory in a loop as it could get and kept it. I figured that there was no quota for memory as there were for hard disk space. I ran the program I wrote into background (&) to get the process id and waited.
Program ate all the available memory and, presumably, started trashing the swap until all of the running processes were extremely slow and/or unresponsive. I watched as people around the room started to close their programs (IRC, gopher mostly) and gave up on using the system. As soon as most of them were gone, I killed the program with pid I had before. It was so effective even things like ls wouldn't work, only kill. I know it was a dick move, but I was a kid and even kind of proud of what I did back then.
I don't think i'll ever forget that password (If you don't understand why, try looking at a qwerty keyboard)
Just how incompetent were the people behind this OS?