But when Mordechai, that irritating Jew-person, refused to bow to him or even acknowledge his presence, he became really incensed to the extent that his blood pressure shot through the roof. Talk about overreacting. Remember, with the Purim story, things are not always as they seem. Part of the point of the parties was to bring the Jewish guests to sin. For appearances sake, there were separate parties for the men and women to lure the guests into thinking that the King and Queen were upholding high moral standards.
Traditional sources suggest that in truth, they wanted to foster sexual misdeeds.
That is, with ONLY her crown and nothing else. That is probably not the case. It is simply beneath my dignity. Perhaps Persian women are used to such obscenity, but I, as a Babylonian princess will not stoop to such a low. Furthermore, remember that Vashti was of royal blood when it is possible that Achashverosh was not.