What evidence is there to support the possibility of a dystopia such as Fahrenheit 451?

Many of the dystopian examples found in Fahrenheit 451 are evident in our modern society. Others.... are undeniably possible. Censorship is rampant, prescription drugs are prevalent, and the popularity and reaction to "reality television" has proven that strangers can be seen as members of the family... people we really know. Each of these dystopian elements illustrate the author's forethought.