In my school, I could once walk directly into the RegistryBase and do whatever I wanted to.

Now though, all schools in Denmark are based on network stuff, where you connect to a gigantic server and get your files. Citrix all the way. They are using Linux though, so if I could bring a linux setup on some flashram, and boot on that, I could fuck around with the linux setup and setup in general. I don't think I can do anything fatal, unless I gain access to the main server, but I think that's hard.

So no, I'm not really a hacker, but I can certainly mess around with stuff.