According to a poll commissioned by the McCormick Tribune Foundation (details here) reveals that Americans know more about the long-running Fox cartoon family the Simpsons than they do about the First Amendment.
Only one-tenth of one percent (1 in 1000 people) of those surveyed were able to name all five freedoms guaranteed by the First Amendment--speech, religion, press, assembly, and petition--while 22 percent could identify the five members of the Simpson family--Homer, Marge, Bart, Lisa, and Maggie.
Awareness of freedom of speech was pretty high in the survey at least. Well over half of respondents (69 percent) named it as a freedom guaranteed by the First Amendment. Knowledge of the other four, however, was low with the next most-cited freedom being religion with just 24 percent. That's 1 percent less than those who were able to name all three of the "American Idol" judges, Randy, Paula, and Simon.