Should the Fashion World ban "Size Zero" models to protect kids?

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Recently in the UK there has been a big debate about very slim "Size Zero" models beng used in catwalk fashions shows. The fashion world in Spain and Italy have already banned these tiny models as they say they are a bad influence on young teenage girls who may get eating disorders trying to copy them. However, London and New York have refused to ban these ultra thin models, even though they know the girls are often anorexic or addicted to some drugs to make them so thin. So do you think young girls really do starve themselves and get eating disorders to try and copy their favourite model or actress? And should they be banned?