My boss asked a client what the syetm should do if somebody tried to access an area they were not supposed to. "it should tell them to bugger off!" was the reply.
When demonstrated, the system (running on MSDOS before the days of GUIs) scrolled up a message in ASCII block characters which said "BUGGER OFF!" in red (my involvement was to have it play the Monty Python theme through the PC speaker while scrolling - all written in Assembler)
For some reason the client's boss was not happy!