Two students -- backed by the Foundation for Individual Rights in Education -- are suing the Tarrant County College District, charging that its limits on rallies are violations of First Amendment rights, the Associated Press reported. The college permits protest activities only in a limited free speech zone, and requires advance permission to schedule events there. College officials say that the rules are consistent with federal and state requirements. But the students say that they are being blocked from engaging in legitimate protest. The students want to rally on behalf of the right to carry concealed weapons on campus and they say that they are being barred from wearing empty holsters on campus as an expression of their views.