Heeeeelp!!! D:

I recently installed Debian on my school iMac, and some mentally disabled guy from my school is now actively going after me, trying to get me in trouble in all sorts of ways, and it has gotten to the point where he's straight up lied to my friends about me hacking the school network and installing Debian on ALL the school computers (which I don't even know how to do :P), and the school staff seem to be on his side (why would you ever side with a mentally disabled 17 year old over a 15 year old that knows what they're doing?)!

Any ideas as to how I could stop this little $#!@ off my tail?