For college students, the courts have been more protective of First Amendment rights. Thus a college's refusal to give a particular student group the same recognition it gave to other groups was held to violate the First Amendment, when the college's refusal was based on a generalized fear of disruption (
Healy v. James, 408 U.S. 169 (1972)) or when the college refused to recognize or provide funds to religious groups while doing so for secular groups (
Widmar v. Vincent, 454 U.S. 263 (1981); Rosenberger v. Rector of the Univ. of Va., 515 U.S. 819 (1995)). While most of these cases involved on-campus speech, some lower courts, and the Supreme Court in Morse, applied these rules to off-campus speech with a possible impact on campus.
Generally, public schools can limit students' speech only if the limitations are content-neutral, further an important government interest, and are "narrowly tailored" to further that interest.
U.S. v. O'Brien, 391 U.S. 367 (1968). In most of the cases, the cited governmental interest is the school's interest in ensuring a safe, non-disruptive educational environment.