Our teachers were pretty novice, and as admins ... um, not really. All the teachers signed in as the superuser (I guess it was root?) to do anything, and they'd often just walk away, leaving us a superuser shell. Fun times. A friend in that class would create superuser accounts, but they find them and delete them. If I remember correctly, there wasn't a RTC backup, so turning the system off meant you had to set the date; and they would only power on the lab when there were students there. So they had this clever script that would run on superuser login that would set the time. So I wrote a little addition that would create a SUID-like shell in some obscure part of the system, so we could have the superuser privs whenever we wanted. A first hack! :) QNX was fun, and it was a good baseline for learning Unix later in University.