Justice Breyer, in Bong Hits 4 Jesus

MORSE v. FREDERICK:

This holding, based as it is on viewpoint restrictions, raises a host of serious concerns.

One concern is that, while the holding is theoretically limited to speech promoting the use of illegal drugs, it could in fact authorize further viewpoint-based restrictions. Illegal drugs, after all, are not the only illegal substances. What about encouraging the underage consumption of alcohol? Moreover, it is unclear how far the Court’s rule regarding drug advocacy extends. What about a conversation during the lunch period where one student suggests that glaucoma sufferers should smoke marijuana to relieve the pain? What about deprecating commentary about an antidrug film shown in school? And what about drug messages mixed with other, more expressly political, content? If, for example, Frederick’s banner had read “LEGALIZE BONG HiTS,” he might be thought to receive protection from the majority’s rule, which goes to speech “encouraging illegal drug use.” Ante, at 2 (emphasis added). But speech advocating change in drug laws might also be perceived of as promoting the disregard of existing drug laws.

Legal principles must treat like instances alike. Those principles do not permit treating “drug use” separately without a satisfying explanation of why drug use is sui generis. To say that illegal drug use is harmful to students, while surely true, does not itself constitute a satisfying explanation because there are many such harms. During a real war, one less metaphorical than the war on drugs, the Court declined an opportunity to draw narrow subject-matter-based lines. Cf. West Virginia Bd. of Ed. v. Barnette (holding students cannot be compelled to recite the Pledge of Allegiance during World War II). We should decline this opportunity today.