In 1976 Carl Andre's sculpture Equivalent VIII, better known as 'The Tate Bricks', caused a national outcry. 'What a Load of Rubbish' screamed the papers, 'it's not even art'. Worse still, in the midst of a severe economic depression, the Bricks were paid for with taxpayers' money. One man was so outraged he went to the Tate Gallery and threw blue food dye all over at them. BBC...