(An exit poll during an election in Hong Kong)
(Picture from Wikipedia)
Ask anyone who will win. And the forgone conclusion is Barack Obama. John McCain also participated!! My "prediction" is at par with the "Exit polls". I shall go "one up"..It's going to be a landslide victory, the biggest in US election history!
So much for the humble opinion. Now what is this "exit poll"? Not to waste time I will just "copy and paste" from Wikipedia:
[An exit poll is a poll of voters taken immediately after they have exited the polling stations. Unlike an opinion poll, which asks whom the voter plans to vote for or some similar formulation, an exit poll asks whom the voter actually voted for. A similar poll conducted before actual voters have voted is called an entrance poll. Pollsters - usually private companies working for newspapers or broadcasters - conduct exit polls to gain an early indication as to how an election has turned out, as in many elections the actual result may take hours or even days to count.
Like all opinion polls, exit polls by nature do include a margin of error. A famous example of exit poll error occurred in the 1992 UK General Election, when two exit polls predicted a hung parliament. The actual vote revealed that Conservative Party Government under John MajorShy Tory Factor), the use of inadequate demographic data and poor choice of sampling points. 
I think it should be banned.
What do you think?
Have A Nice Day!
(Postscript/Breaking News: A landslide victory it is!!)