I agree that inclusive lockerrooms should be something a private business can decide to do on their own.  If you have inclusive locker rooms then let people know and let them decide to buy in or to not use those facilities. However she should have been offered a pro-rated refund or termination of her contract if the facilities / policy was not up to her standards.    I think this person was an asshole, definitely, but on the broader topic I think business should be able to have whatever policy they want in their lockers and bathrooms.  I just don't think it should be mandated by law unless the person has had reassignment.