if they pull it off, then good for them,
if they get insulted easy from people refering to them as guys, until corrected
then they shouldnt do it
personally id prefer seeing "genderbent" cosplay
(where they characters gender is changed instead)
i just feel its wierd to go all drag queen, if you can have the same fun
cosplaying as a oposite gender version of the character
im kinda sexist when it comes to this stuff
if a dude does it, im like "lol, thats messed up bro" but i have no care one way or the other
if a girl does it, for cosplay, im more "its kinda wierd, but good for you"
but in everyday life its more "why would you do that to yourself? you could be so pretty"