Hijaab is an Attitude, not a Fashion (and it's for Men Too!!)
Muslim tourist wearing a headscarf
Wearing the Hijaab isn't just a matter of simply putting a piece of cloth on your head, it is an attitude, a way of thinking and behaving, and accepting yourself for who and what you are. Basically it constitutes an Islamic way of life, it is a statement which indeed should portray a certain attitude.
A woman may indeed wear a long skirt and a scarf, but if she flirts constantly, then she can't be really described as wearing the Hijaab (Indeed clothes should be long, loose and not see through, after which any style of clothing is applicable).