Flatbush27:
First of all, it is inaccurate and misleading to state that “getting drunk is a mitzva,” so why should it be banned. If you went to a standard yeshiva, I’m sure you are well aware of the many interpretations of “ad d’lo yada,” none of which allow a Jewish man, married or unmarried, to get so embarrassingly plastered that he cannot learn or daven. The Mishna Berurah also encourages us to remember that things like stealing do not become suddenly permissible because it’s Purim.
That being said, it might make more sense to say that “being mekayam ad d’lo yada” is a mitzvah, and should not be banned–taking into account, of course, that ad d’lo yada is not supposed to be a blanket allowance to drink within a pint of alcohol poisoning and then pass out in a pool of your own vomit on the Beis Midrash floor.
It seems to me that some people are far too quick to find some way in which they can blame women for the debauchery that can sometimes occur on Purim–most of it the result of too much alcohol and too little self-monitoring. Yes, girls have worn and probably will wear costumes that some deem too provocative, but let’s remember that dressing provocatively is an issue to be contended with 365 days a year, not just on Purim. And, just like all the other days of the year, it is incumbent on the men to avoid encouraging or gaping openly at those attired inappropriately.
So your question is really a non-question. Can women wear non-provocative costumes? Yes, they can, just as men can. If it bothers you that you have to share the mitzvos and minhagei hayom with the opposite sex, I’m terribly sorry for you, but it’s their mitzvah too. Can women dress provocatively and inappropriately? No, they can’t, and that is not a concept unique to Purim.