First off, the title of this post is meant with a liberal does of irony. Secondly, here is a left field anecdote that does have a bearing on the forthcoming discussion. I can remember going to the local Co-op Supermarket with my Mother circa 1975. A small selection of groceries were purchased. My Mother then went to pack the shopping when she realised that she didn’t have her regular shopping bag with her. If memory serves it was a typical seventies monstrosity made out of lurid coloured nylon. However she did have a plastic bag from a rival supermarket. I vividly remember the outrage this breach in social etiquette caused. Simply put, the Co-op did not like its products being put in the bag of a competitor. Needless to say, words were exchanged, there were red faces and indignation all round and we left after threatening to write a strongly worded letter to The Times.