It's the knowledge that if people who disapprove should read you, they will keep their opinions to themselves. And the knowledge that the majority of people don't care what the people they won't ever see again are wearing.
Put yourself in the same shoes. You are out somewhere and you see someone dressed in a way that you believe is unusual. You might glance at them twice, but then you'd go on your way and attend to your own business. If they should ask you for the time or for directions, you'd be nice and answer their question.
Having said that, you will place yourself at an advantage if you dress appropriately according to the venue, meaning you should wear what other GGs are wearing, with not too much makeup and no platinum blonde cheap wig that screams, "CD". When in a nightclub you can dress a bit racier, but at the mall (for example) most women dress like this:
http://www2.pictures.zimbio.com/gi/C...ShF-Up2m0l.jpg
http://www.vervemag.com/storage/may-...et-1-Alpha.jpg
http://us.123rf.com/400wm/400/400/st...pping-mall.jpg
Good luck!
