There really aren’t that many of them, they just are really good at posting again and again.
There are 16 freepers who say “anybody but Mitt”. That’s the LOWEST of all our candidates.
There are of course a few hundred who say they won’t vote for anybody. But while that’s a problem, it is one for ALL of our candidates, and therefore to be discounted when discussing which candidate has the best chance of getting votes.
Further, given that Romney is the LEAST disliked of all the candidates among people who are still willing to vote, there’s a good chance that he’s the MOST likely to coax the “won’t vote” people out.