Family Research Council President Tony Perkins on Monday warned that school policies baring discrimination against LGBT students could result in "teenage boys invading girls' locker rooms."

In his Washington Watch Daily Radio Commentary, Perkins said that recent Massachusetts Department of Education guidelines protecting transgender students meant "rolling out the welcome mat to cross-dressing students by banning everything from gender-based sports teams to sex-specific bathrooms."

"And anyone who doesn't like it had better keep quiet--or else," he quipped. "If a student so much as refers to a peer by their biological sex, it's 'grounds for discipline.'"

Perkins said it was "no wonder" some parents refused to let their children go to public schools.

"Maybe, you've fallen for the lie that same-sex 'marriage' won't affect you," the anti-LGBT activist opined. "Well, it may take teenage boys invading girls' locker rooms to prove it."

"Redefining marriage is about a lot more than two people who love each other. This is about the fundamental altering of society. If you want to protect your kids from a fate like Massachusetts's, it starts by defending marriage now."

Last week, MassResistance President Brian Camenker told a conservative radio show that school administrators would be "like the Nazi concentration camp guards" if they agreed to follow the new anti-discrimination guidelines in Massachusetts.

The Southern Poverty Law Center noted last year that it had listed the Family Research Council as a hate group since 2010 because “it has knowingly spread false and denigrating propaganda about LGBT people,” including the claim pedophilia was a “homosexual problem.”

Listen to this audio from the Family Research Council, broadcast March 4, 2013.

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(h/t: Right Wing Watch)