Well, there are a lot of talking heads on certain news channels I can't stand. Abrasive, muck-raking, inference rather than facts, etc., that I would love to see off the air. But I am equally sure that some of the more liberal-viewed talking heads I mind less than the bombastic ones are equally loathed by people whose views on many issues diverge wildly from mine. They would love to see them fired as well. At the end of the day, I control what I watch and read, and more importantly, how I interpret these things. I am perfectly capable of seeing through artiface, of gathering facts from more than one screeching scare-tactic "news" source and coming to my own conclusions. I don't need other websites watch-dogging for me.
I don't have certain channels on, I never bother with programs or blogs or websites that I think are flat out ignorant, unless I want a laugh, or I want to depress myself by reading something that I know many less open-minded people will read and take as truth/gospel.

But you can't have it both ways - I can't force media outlets to always have people that skew more toward my point of view and ONLY that. Freedom of the press means other people get to air their views too, even if I wish they'd shut up forever.
As for Nancy Grace and her ilk on any side of the political spectrum - there is a reason they are called media personalities and NOT journalists. They are shallow ill-informed salaried mouthpieces. A good journalist, willing to dig into a story and report on what s/he learns is worth their weight in gold. Nancy Grace's screeching showboating is not worth the weight of a feather.