No one is forced anywhere.  They always have the option to use a separate facility.  The only restriction place on trans people is the same restriction we place on everyone else...you are not allowed to violate the bodily privacy of others by using the facility of the opposite sex.

If privacy and dignity matter to you, you will respect it for others.  If you don't want to use your sex-assigned facility, you can risk being arrested for using the wrong facility, or you can safely use a separate facility.  YOU shoulder the risk of your decision...not the 4 year old child that doesn't want to see you naked in the YMCA locker room.  That's how it should be.