Interview 100 people, then only show the 7 dumbest.
Exactly. That's how they do it when they go to T.E.A. party rallies too. Just show the ones getting it wrong or saying something that you can paint the whole group with. Like this.
American University and the TEA Party = BFF
If you doubt it go to the mall and check yourself. I did and there were a lot more than 7.