I go to a small town university (it's 2 hours out of Niagara Falls), and I don't haze the newcomers. I'm in 3rd year, and most of the newcomers are terrified already of the new responsibilities and other shit.
I did however - run pass an orientation group looking wet your pants scared and crying and screamed "Run while you can!" I got a couple of other people to join in as well.
Edit: In high school, some senior decided to fuck with me, and call me names. She made to straight arm me (push me away). I dodged, and she tried to scratch me with her horrid long nails. I walked into her reach, and punched her - hard in the ribs. She went down like a sack of old potatoes, resistance completely gone. We were escorted into the principal's office, and I got off scot free because a lot of people backed me up that she made the first move. I learned later that she ended up with fractured ribs. Never mess with a junior just because you can.