"More than 40 years ago, the Supreme Court held that students do not "shed their constitutional rights to freedom of speech or expression at the schoolhouse gate." The court held that schools may prohibit speech only where it causes "substantial disruption of or material interference with school activities."
In 2007 the U.S Supreme Court carved out an exception to allow prohibiting talking about using drugs, without any evidence of disruption.
The 6th Circuit has expanded that 2007 exception. "In its opinion, the circuit held that 'school administrators can limit speech in a reasonable fashion to further important policies at the heart of public education' without showing that the restrictions satisfied the 'substantial disruption' standard."
Conservative courts continue to whittle away at our basic civil rights.