User blog comment:Cloverfield monster/How come herbivores are never portrayed as bad guys?/@comment-1187034-20150617013041/@comment-1187034-20150618004705

Furthermore, when a herbivore attacks it's usually out of being threatened by something. So if a herbivore starts attacking people in a film the audience might think that whoever's in its way deserves to be attacked for disturbing what can be considered an innocent creature. However, a carnivore when it attacks is more horrifying because it doesn't kill out of defense. It hunts life forms regardless if what it is hunting is good or evil and doesn't have a morality doing so and shows no regret or remorse for attacking its prey. Because the audience can't understand a predator's actions or even feel sympathetic for something with these traits, this probably another reason Tyrannosaurus rex is used as a villain rather than something like a sauropod.