Without this turning into a huge law debate, TRUST ME when I say I am sure about this.
You are right in the respect that IF someone said, 'this crime was commited against me, and I would like to file a complaint' then there would be a violation of the law. With ANY Misdemeanor in the state of California, the offense MUST be commited within the presence of the arresting party.
This means that say the police respond to ANY misdemeanor and it hasn't been committed in their presence, then the victim must sign the arresting complaint and THEY will be the complaintant in the judicial matter. If the police witness something, say you going 100MPH in a 55, then they are the complaintant, representing the city.. however if they only have reasonable suspicion to believe you committed the misdemeanor (it is much different for a felony) then because it is only a misdemeanor they need a victim as the arresting party.
You can lookup case law and the state law (the education code is JUST as enforceable as the penal code) but I 100% guarentee you I am right.
As for hazing.. not only would it be a tough sell in court that there was degredation of the pledges being that they CONTINUED the pledging process for days/weeks/months after the hazing event, but THEY themselves would have to say they were victimized.
Trust me I know a little bit about this.

Casey