Back to the original topic Sandman posted. Did the students have a first amendment right to protest at the graduation commencement ceremony?
What comes to mind for me is they didn't, due to the invitational nature of the ceremony, i.e. invitations were sent out by the graduates for guests to attend, making it an assembly of like-minded people...which is protected by the constitution.
Regarding freedom of speech, this is not mentioned in the first amendment...freedom of the press is specifically mentioned. And also the press has responsibilities and is accountable for what it prints. If you don't like or agree with the editorials, you can write a letter to the editor. You sign your name to it and take responsibility for what you write. In this way, you're excercising your freedom of speech through freedom of the press.
Protesting, picketing and demonstrating are legal devices, providing all the proper request forms are filled out and permits obtained. This is to help insure there is adequate fire and police protection on the scene. I'm sure this has to do with city codes, etc...
Taking all this into consideration, I don't equate these students' rights with what they were planning on doing at the ceremony, and, in my opinion, the university should be applauded for standing up for the constitutional rights of the assemblage by removing potential troublemakers.
Les