A fast-moving proposal in Delaware would force trans students to choose between sacrificing their civil rights at school or being forcibly outed to their parents — putting them at risk of parental rejection, abuse, or even homelessness.

Delaware Regulation 225 was supposed to provide essential anti-discrimination guidance to ensure that transgender students were treated with basic dignity in schools. An original draft of the regulation was widely supported by students, civil rights advocates, and teachers, and should have smoothed to passage in solid-blue Delaware. But then, under intense pressure from fear-mongering anti-trans activists, the state Education Department revised the proposal, adding a horrific “parental notification” provision.

The ...