It's not wrong to be thin, nor is it wrong to find thin women attractive.  It is wrong to try to live up to other people's standards and expectations, whether those standards and expectations are realistic or not.  Anorexics are their own victims, not society's.  I don't think emaciation is something anyone considers beautiful.

There's another eating disorder called obesity, that's far more prevalent than anorexia.  I would be willing to bet that obesity kills more people and causes more health problems than anorexia.  Yet, no one finds death from obesity-related causes to be tragic.

Bottom line -- we need to learn to be happy with ourselves and learn to live with our limitations.  I don't think it's our "standards of beauty" that are causing these eating disorders.