Found here is an excellent article by Peter Daou which explains why we should all be concerned that the media is giving a platform to the hate-mongering of Ann Coulter.
Another note to Bushwack since you ask why no one says she's wrong. Maybe we Liberals take for granted that people will know we disagree with 99.99% of what she says. I'm not sure what rational points she makes. From the little snippets of her writings or interviews, it seems to me as though all she does is hurl insults.
I think it's beyond decency to say that a Congressman is the reason soldiers invented fragging (assassinating an unpopular member of one's own unit). To even suggest that happen to another human being is way over the line. I can only imagine the outcry is someone Liberal or even moderate had said something similar about a figure they consider unpopular.
Those who are concerned about the media and fairness can also visit mediamatters.org. There are many great articles and resources there.