Excessive violence in the futuristic world of Fahrenheit 451 betrays a problematic underbelly to the status quo. Teenagers go around killing each other, TV is filled to the brim with violence, and even driving a car brings on the crazed thirst for speed and destruction. Violence is an outlet, and the cravings for such behavior mark the dissatisfaction of the general populous.
Violence is a mask for fear in Fahrenheit 451.