Bad things happen to other people, and sometimes it's easier to get their job done if they skirt the rules a bit. The target-du-jour would be fine if they hadn't been doing activity-du-jour anyways, so it's not like the person didn't deserve it.

Few believe that it will happen to them.

Humans are really good at denial, rationalization and ignoring the plight of people they do not directly care about.

It's a damning combination.