Here is a classic example of why these polls are junk. If you can vote repeatedly, then anyone with a few minutes can pound their view into the system. Even if you can't, all it takes is the poll going viral in either the left or right leaning "blog-o-sphere" with people posting, "Go vote here" to like minded people, the results skew.
I've seen both sides rush to "win" polls, I've even had the 'pleasure' of trying to prevent fraud and make it accurate. It just isn't possible unless you randomly select the pool.
TL;DR - Math is hard, take the results with a grain of sand.
H.

