It is no secret that some individuals and communities take issue with the concern of intellectual freedom expressed in the preceding paragraphs. Efforts to ban idea limit information, remove textbooks, and censor libraries and school curricula and common. Examination of restraints and pressures on students, teachers, and adminstrators provides a wide range of illustrations. These include banning of classroom and library teaching materials, restrictions on teaching controversial issues, denying educators the right to hold public office, preventing school systems from inviting controversial guest speakers, and protests against curricula referred to as ultra-liberal.