Polling is a good way to sway fence sitters. I can poll a specific group to get any response I want. 75% of my household thinks I am the smartest man in the world. What causes this they are young and don't know better. If I were to give a 30 min lecture in a college level civics class I would likely be voted dumbest in the room. Don't believe any poll ever.
It is too easy to sway the response in so many ways.
You can't fix stupid....however ignorance can be cured through education!