It would be funny if one day it actually got through to see them try and police it. "Excuse me, hi... errr.... are you... uummm.. you know.... were you...errrrrrr..... so.. what I'm trying to ask is...... oh ->-bleeped-<- it I quit". "no you do it, I tried... it's too awkward... I simply don't feel comfortable asking everyone that enters the female toilet what sex or gender they are".