It seems you can't win. I recall previous threads about Halloween saying if you dressed like a standard woman, then you would look too good for someone just doing it for that night. So it is usually said to wear a costume to avoid. Now if you wear a costume, you must be a crossdresser because you are avoiding dressing like a woman.
This answers the threads about the percentage of men that are crossdressers. It is 100%! You are either wearing woman's clothing or not wearing it so no one will guess you are a crossdresser. :D