In Fahrenheit 451, Bradbury uses the firemen as the enforcing form of government. The firemen are usually feared by everyone, and they strike the fear into people by threatening them, in ways like the Hound.
Strong Government Control
The Protagonist Rebels
In dystopias, the protagonist usually rebels against the stronger government. In Fahrenheit 451, Montag rebels by reading the books he had stored in his basement, cramming all of the information into his mind before Beatty finds and burns his house.
Fahrenheit 451 is futuristic in a few ways., however, the most dominant and obvious example is the Hound. At the time Bradbury wrote the novel, this seemed like it would be way in the future beyond his life, which it is, as we have still not mastered something quite as advanced as the hound.
In the story, citizens are told that books are evil, and that they are a waste of time, but in reality, they are very important and needed to make a society work well, because the people are educated.
Truth is Hidden
Strict discipline is a large factor of dystopias. In Fahrenheit 451, an example of strict discipline would be the Hound again, and how it killed an innocent man near the end of the story. The other example would be at the beginning, the woman's house was burned because she had books.
Bradbury's example of a "perfect society" illusion is in the setting. It is described in the beginning of the book that the homes of the citizens are all exactly the same, and no one can have a different abode.