When I was at school about six years ago the only two PCs were in the library (the rest where Acorns - yay!). When one of them had a problem a friend booted it into DOS to do something (config.sys I think). The librarian came across and didn't understand what he was doing and sent him to the Headteacher. There he got a severe bollocking from the who was told he was trying to "hack" the PC - she refused to listing to any explanations.
He is now fairly senior in the Hampshire County Council Education IT support service, and recently he gleefully told me he was able to administer a severe bollocking back to the very same Headteacher for puchasing unapproved PCs which they would find very difficult to support!

What goes around comes around - even if it takes six years!

Gareth