Man. People jumped on this poster so quickly, and I take it the reason is because everyone wants to appear tolerant. But if what the OP is true, then this would be a serious cause for concern. Consider how your reaction would be if you were a smaller female, alone in a restroom, and a larger, physically imposing male were in there with you.. Wouldn't you feel uncomfortable? As many people as there are who question their gender identity, there are also a great number of perverted people who don't mind taking advantage of the system for sick thrills. I say this because this exact thing was happening at my school. A "gentleman" was using the women's restroom regularly and nobody did anything about it. Then one night, a girl walked into a stall, found him waiting in there for her, and he proceeded to grope her until she escaped and ran for help.
I know I'll catch a lot of crap for saying this, but can't we be half as considerate to people who are uncomfortable (with perfectly good reason) with men in a women's restroom, as we are with those who identity with another gender.