Remember online polls allow the world to vote too.
How many times have you seen someone here say "freep this poll"?
Just because it's open to the public doesn't mean it's in any way shape or form accurate.
As I said, the same person can sit all night and click. Even on polls where they log IP's to prevent that very thing. Even I use an anonymous proxy to prevent IP blocks or get around bans from Indy media sites where they hate comments that differ from their own.
The number of left wing moonbats using anonymous proxy's is probably 10 times that of right wing people, because their vulgar posts result in bans far more often.