it's funny how US girls LOVE to wear the bridal dupatta on. We try to make it a point to look our best with the duppatta on our head... yet once the big day is over - we want to throw it out in some corner hoping never to find it again!
It's her personal choice. Why are you mocking her for it? You think that approach makes any one of us non-hijabis care for a hijab? It drives us away from it more.