I think the example in the first paragraphs of the article (the Klan effigy with candid camera) is not the strongest one; it was a weird device for data collection, not really speech. The problem is better illustrated by some of the other articles: leftist students attacking things they disagree with, not by responding to them, but by going to the authorities and claiming to feel "unsafe". They have in many cases abused Title IX, claiming that this book or that lecture creates a "hostile environment" (i.e., lying without shame), because they know it's a way to trap an opponent in a lengthy, biased pseudo-judicial process. In these kinds of attacks, it's not about getting a conviction, because the leftists know their charges are false. Instead, "the process is the punishment". They want to make examples and terrorize others into self-censorship. These attacks are happening all over the country and they are not just good people taking it too far -- they are malicious and intentional.