The Map and Drugs

Barton and Barton bring up an interesting outlook on the influences of maps. However, I don't believe there can be a solution. In recent history, the world has "grown smaller" due to advance in communication and travel. However, the majority of the human population is dependent on maps to shape their view of parts of the world, for no other reason than they will never visit. This makes borders and names all-the-more important as a location's very recognition of existence is in jeopardy with a map-making mistake.
Also, we must realize that maps are not intended to provide all the information pertaining to a place. Maps are used for specific reasons. If I'm sightseeing, it's acceptable for a map of Paris to exaggerate it's sites and attractions over towns and villages in the countryside. If I'm using a map for war, it's acceptable for the map to limit itself to terrain and locations of strategic value. Therefore, maps are different, not only for the different perspective of who made the map, but for the varying perspectives of those who use the maps.
Lastly, a map is a representation. By it's very definition, a representation cannot nor will not be actual in its details. To avoid Borges dilemma of mapping an empire with a map the size of that empire, maps are miniature representations and must leave certain things aside. This is why a topographical map is different from a tourism map.

Shriver points out many things that would appear to be obvious, except that we do not look for them unless pointed out. Three things stood out to me especially.
1) Convincing a target audience takes more than a simple understanding of the material.
2) Graphics used must appeal to the target audience if it is sought to hold its attention.
3) You cannot undermine the intelligence of your audience by assuming ignorance on the subject.

My questions:
In the situation presented by Shriver, are graphics used for brochures "dumbed-down" on account of the author's unwillingness to admit that the subject matter is public in nature?