I am in way trying to rationalize violence. As I stated I am opposed to "hazing". Pledging doesn't neccessarily have anything to do with physical punishment. What you saw at that "set" was down right hazing. I would call it Assault. But that is not the norm nor does that describe the events of every undergraduate chapter in the organization. I just honestly don't believe in punishing the collective for the mistakes of a few. That's like saying because a couple of young black men rob a bank so now we can't let any young black men in the banks. How would that make the other young black men feel that didn't do anything wrong. It wouldn't be fair to them. As this wouldn't be fair to the undergraduate chapters who are abiding by the "rules". You have to look at all the positive things that these undergrads are doing on their campus and in the community. It is so easy for people to always see the negative. In fact a great number of graduate members were exposed to "Greek" life as an undergrad. Our founders were undergrads.
I agree that something has to be done. I just don't think that terminating undergraduate membership is the answer. Whether you like it or not that is the future of the organization.