Never knew you could do a remote shutdown like this, but we did find out about a "net send" command to put popups onto other kids' computers.
Later we found a neat exploit / remote access kit, friend of mine could merge the backdoor onto a random .exe file (we used a desktop sheep because ha ha look at the funny sheep). We got that onto a number of school PC's and told people off for using MSN at school for example. I also used it on my parents' computer and found out how much they had on their savings account.
Hazy memory but I forged the NetWare login screen to grab admin password then replaced the original login process with one that logged all logins. Was a moron and left a printout somewhere and I was the first suspect. Had a good relationship with the compsci teachers so I somehow ended up getting a shared office and got paid by the school to secure their systems.
This is true! I also have a good story about how certain network cameras were left unprotected on the school network and some individuals took advantage of that by guessing the default password.
They only took my account away in high school.
Silly: I had a dozen other accounts ;)
shutdown /r /m \\IPAddress /t 0 *
Today in schools, this would sadly get you expelled for "computer network hacking".