that's not what happens "these days".
and trans women have been using the woman's room for decades.
we are talking about trans women, not just a guy who decides he wants to go creep on women. a man violating privacy of women with no pretense of being trans should be illegal. and is in most jurisdictions as far as i know. and it's not a valid defense to just say i felt like a woman that day.
again, people like you want trans men to use the woman's facility. individuals who look like a guy, dress like a guy, testosterone of a guy, beard, using woman's facilities.
legislate the pervs and protect the well intentioned innocents.