And for any cis people having a hard time understanding why this is a problem, these bills also implicitly require cis people to prove their sex. Bathroom vigilantes are already challenging cis women who don't look feminine "enough," presuming they are trans and harassing them – bringing a disturbing online "transvestigator" phenomenon into real life.
Nobody should have to display either a birth certificate or their genitals in order to relieve themselves in peace in a public restroom.
This is madness.