First, the Alternate Possibility
If Dean is going to make an issue of 'gotcha' journalism via misquotes and out of context statements, he should go the whole way.
1.Bash the media, sure it can come across as whiny, but it worked wonders for Spiro Agnew. In fact, running against the media is usually very popular. He also needs to make perfectly clear that he is making an issue of misquotes and statements taken out of context, and nothing more. Repeat that word and phrase endlessly.
2.Bring up how serious an issue it can become: "if everything politician's say will be taken out of context for partisan political purposes, politicians won't say anything other than the most benign pap, and we could be in danger of losing serious democratic debate in the country".
I don't know if that is over the top or not, but everybody knows the media loves to examine itself, and it would likely make a whole lot of journalists take a second look at how accurate they are being in their statements.
On the other hand, maybe journalists are as stupid as they seem, and truly don't understand that "in theory, something good could come out of Hamas taken over the leadership of Palestine" is not the same as "there is good in Hamas".