You can of course also make quite convincing BIOS password prompts with QBasic.
I talked the teacher into canceling all of my detentions in return for showing him how to secure his bootdisks. Man, kids today would just get expelled or go to jail. I'm glad I grew up when I did.
Me and the girl were white honor students, and we were let off with a stern warning, and our "weapons" were handed to our parents. The mexican kid with poor english skills got sent to an alternative school (the kind for disciplinary risk kids).