The topic you outlined seems rather close to the personal opinions about homosexuals or abortion. Calling someone a slut isn't likely to go over well with your teacher. While I personally agree that many young women dress inappropriately, that's a personal opinion and not a societal issue. Swift wrote about the treatment of the Irish, poverty, and other societal issues. I would look for something a with a broader scope for all of society rather than something as personal as clothing choices. The economy leaves a lot of room for satire
right now. You could look at some of the 99% campaign to get ideas. I gave this project to my students as well. Some of the things they wrote about were economic issues, school system policies, some of our school policies, student apathy towards education, etc. Pick something that you feel needs change or attention but pick something that is less personal opinion and more fact.