(1/2)
Not necessarily. If these prayers threatened other people, certainly not (e.g. "Dear God please curse the people of XY b/c...)
However, as the separation of church and state is an iron princilple of Western democracy, I am not sure if a uni campus of the state is the best place fo a mass congregation...
Also, given 9/11, I could imagine that a lot of students would feel unsecure if (theoretically) a big crowd of people started...