First Amendment Free Zones

That would be the California Public Schools.

In California, a high school girl is ordered to remove an NRA t-shirt because it promotes "gun violence". The more likely reason is that it didn't jib with the administration's politics. The girl was simply wearing a gift from her dad, but the message on the shirt is still protected speech. Hire a lawyer. Sue.

[UPDATE: 10/4/2013] The School apologized. Something about a lawsuit by the NRA might have had something to do with it.