I was in a supermarket and had just finished collecting the half a dozen items which I needed. As I approached the check-out, a woman with a fully loaded trolley pushed in ahead of me. I drew her attention to the "Baskets Only" which hung over the till. She just swore at me. I therefore explained to her that "the sign refers to the container of your shopping and not to the legitemacy of your birth". Her reply included the word F**K about four times and quite upset several older ladies in the queue. My reply was "Do you need to let everybody know what you do for a living ?". The older ladies seemed quite amused be this and with a flood of even worse invective she took herself off to another (trolley) queue.