In Burnside v. Byars, 363 F.2d 744 (5th Cir.1966), a number of students came to school wearing the buttons. The principal told the entire student body that they were not permitted to wear these buttons in the schoolhouse or in various classes. Despite this warning, three or four students appeared at school wearing the buttons the next day. All were given an opportunity to remove them. Three did not remove them and were sent home. Several days afterwards, 30 or 40 students came to school displaying these buttons. A teacher complained that they were causing a commotion, and the principal gave the students the opportunity of removing the buttons or going home. A large number of those elected to return home, and they were suspended. The court of appeals noted that other students only showed a mild curiosity over the insignia, and even the principal testified that the children were expelled not for causing a commotion or disrupting classes but for violating a school regulation. Burnside, 363 F.2d at 748. The court found that the regulation was arbitrary and unreasonable, and directed the district court to enter an injunction forbidding its enforcement. The court concluded with these comments: We must also emphasize that school officials cannot ignore expressions of feelings with which they do not wish to contend. They cannot infringe on their students' right to free and unrestricted expression as guaranteed to them under the First Amendment to the Constitution, where the exercise of such rights in the school buildings and school rooms do not materially and substantially interfere with the requirements of appropriate discipline in the operation of the school. Id. at 749.