I have a friend who was getting rather fed up with his job as tech support at a London computer shop in the mid 80s. The final straw came after someone sent him a floppy disk with a note stapled to it. He resolved to leave as soon as possible. The next customer who rang said he was having trouble with the sprocket holes aligning in his printer and could the procedure for putting paper in be explained to him. So my friend tried to explain but the person on the end of the phone was getting more and more irate with him. My friend just gave up shouted down the phone: “why don’t you work it out for yourself you ignorant cunt?”. He was fired pretty quickly after that.