[atiti]

I also had a similar story. It was also early 2000s and our high school had a calendar system for each student so they could look up in which room they would have what class. So a friend of mine and I have setup a proxy server which would modify rooms randomly, or randomly cancel classes. In order to "test out" our code, we ARP+DNS spoofed the the whole school network, so anyone visiting the site internally would end up on our site. Most students thought it was super fun that their classes were "cancelled" but obviously teachers didn't approve :-)

It was also a couple of months away from our graduation, and we did get into pretty big trouble, where we got suspended, and had to write a letter of apology to the principal so they would allow us to graduate.