For victims to forgive is one thing, for an institution to forgive an act by not demanding a price for the crime is an injustice. They basically received a slap on the wrist and the workers moved to a different part of the university ground. I think they should have been expelled. I think this is a forced show of forgiveness.
I agree that it is the person who is wronged who should have the option to forgive. This is just a case of money and power. The real deal would have been for the workers to publicly forgive the students for their acts. And mean it. I was answering the general sentiment.
In this case, as you said, the young men do not feel intimidated and probably also do not think they did anything wrong. Ideally, I would like them to drink the workers urine.