Crossdressing is one thing... but slapping on a dress and looking like a total douche (i.e. guy, scruffy, not even 'trying' to pull it off convincingly [see def. 'Trap', -desu]) is just a guy in a dress.
I've seen some exquisite Traps that pulled out all the stops, so convincingly, that one I saw was escorted out of the men's room at AX05 and 'forced' to use the women's room because the security officer (off-duty cop) was convinced.
"Ergo doth the Trap be, that squat and piss must he."