Well first off the politician said he would answer the questions which was very good of him. However the school didn't want to look like an idiot I'm sure so they tried to have the kid cut short so he couldn't ask anymore bad questions.
I know that for certain in public schools (say HS) they can limit what is said/worn ect so I'm assuming a public university can place limits on what people can do. This limit would be to keep their university from looking like a bunch of idiots go there.
I've been tasered before (by a friend lol) and its not going to kill you. You black out, hit the group, and wake up with your head hurting a wee bit. It's not the end of the world, and its better than the police using the knight sticks or even mace.