My abiding memory of BBC Micros at school was my lab partner hacking the speech synthesiser that was the Comp Sci teacher's pride and joy, and getting it to tell said teacher to "$^%& OFF Mr XXX" repeatedly on endless loop and then locking it up somehow so it took him the best part of the lesson to get it to stop (somehow he struggled on rather than just pulling the plug on it).
Ahhhh - happy times. Don't know what ever happened to the teacher. My erstwhile lab partner has a fairly high profile and responsible job these days so go figure.....
