https://en.wikipedia.org/wiki/Tinker_v._Des_Moines_Independent_Community_School_District https://en.wikipedia.org/wiki/Tinker_v._Des_Moines_Independe... In Tin

https://en.wikipedia.org/wiki/Tinker_v._Des_Moines_Independent_Community_School_District https://en.wikipedia.org/wiki/Tinker_v._Des_Moines_Independe... In Tinker the supreme court ruled that schools can limit SOME speech ON/around school premises under narrow circumstances. However, in this case, Mahanoy Area School District v. B.L. - B.L. was not on school grounds at the time, simply references school. The Defence in Mahanoy vs B.L. actually tried to muddle in the standard test under Tinker of "substantial disruption" to this case, but the court basically told them to kick rocks on that.