Asking the wrong question IMO. Even if the "follow-through" happens at a higher rate that doesn't necessarily influence whether this data should be hidden or not. You have to look at why the data is public in the first place - "I pay this person's salary, so I am entitled to know how much their salary is (among other things you typically know about an employee)."

Whether or not violence committed against public servants happens at a higher rate than the private citizenry doesn't impact the truthfulness of that statement. So if the article wants to make a coherent argument for hiding this type of information about public servants from the public, it needs to attack that point.