@HarvestMoon1: Restricting movement or impeding access are probably fine. But what about “interfering with regular activities.” What’s limiting that? Why can’t CMC say that protesting interferes with their ability to bring speakers onto campus, which is a regular activity, cite evidence of cancelled speakers, and thereby prohibit protest? While permissible in a private institution, I think there would be a serious vagueness problem for a state school.
I believe the case you refer to is [Hodge v. Talkin](https://www.cadc.uscourts.gov/internet/opinions.nsf/D8B3547AD4B7D85685257EAF004F71BC/$file/13-5250-1570216.pdf). The district court found it unconstitutional, but the Court of Appeal overturned the District Court and upheld the statute. SCOTUS denied cert. The regulation in question was over 60 years old at the time.