"Push" polls often used to sway the public rather than react to it, because many people don't know but really want to fit in, for fear of seeming unknowing to others (who are also just as likely not to know).
Look for daily, repeated internet "news" splashes relating the results of tiny polls to tell you some politician or idea is growingly popular or growingly unpopular, without really discussing any substance.
I guess it works, mores the pity.
However, before we try to be like the "cool kids" (metaphorically speaking) we should first determine if those we hope to emulate have a clue. Too much public discourse is really just evidence of a herd instinct.
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