I think it's a good political move to refer to the actions of the media as a 'blood libel'. The term will massively inflame the left and their media lapdogs... and they *will* rally against her about her use. Which then gives her a forum to speak in about how their behavior is like a 'blood libel'. After all, the press really can't write much about Palin without having anything from her to write about.
Which then turns the whole media story away from the "TEA party and Palin caused the shooting of a Senator" storyline... to a "Is the media reaction a blood libel? We say No!"
Since so many people only really get their news from headlines or the TV, a story like that will make think a bit (if they are even following it at all). And the media (or libtards, for that matter) can't tolerate people forming their own opinions, you know.
The MSM will now waste vast amounts of air time and effort, to define it, criticize it and use it against her. This is like throwing a bloody, meat covered bone into the middle of a pack of fighting Pit Bulls. The Public will grow very tired of it. Sarah's name will become a household word, and more and more people will look into her profile even deeper.
When that happens, her intelligence, integrity and intuitive logic will go to her credit, while at the same time, completely expose the MSM for what they truly are; The REAL cause of all this deadly Leftist rhetoric.