Knowing (or preparing) your audience can have a tremendous effect on how your propaganda will impact them. Here are some rules of thumb:

• The more specific the symbols you use to encode your story, the more limited an audience it will affect. The less specific the symbols, the greater potential audience.
• The more specific the symbols used to encode the story, the greater the likelihood it will have an impact on the portion of the audience that understands the symbols. The less specific the symbols, the less impact the story will have.
• The more familiar an audience is with the symbols used to encode a story, the more susceptible they are to propaganda. The less familiar, the less susceptible.

From the Dramatica Theory Book