As I've said many times, this is common sense, something that you shouldn't even need a law to tell you: penises in the men's room, vaginas in the women's room. That's just common sense, and shouldn't even be debatable. So yes, I kind of am sick of the bathroom question. We shouldn't have to pass a law to tell men to stay the hell out of women's bathrooms.
This is a matter of spite in your case and you very seriously need to work on getting over it, because you are hurting people and making yourself look really really bad. Im sorry some girl told you off at your LGBT group...but think logically. Don't make transgenderism about the potty.
God forbid you ever have a daughter who needs to use the bathroom in public at a young age.