Once you've seen firsthand just how biased and intentionally misleading they can be you will see how fundamentally flawed their model is.
You shouldn't trust what Soledad O'Brien says just because she happens to work at CNN. Even the best of these organizations don't do enough to maintain the standards that would be necessary for you to trust everyone who works for them.
Hopefully in the future journalists will live and die by their own reputations, and not get to hide behind the power of "trusted" brands. The system as it is causes great harm to individuals, companies, and the world at large.
Just look at what certain people were able to do by leveraging the power of trusted news sources in the lead up to the the Iraq war. A few corrupt individuals were able to abuse the public's trust to push an agenda based on lies.
On a much smaller scale this is what Soledad O'Brien is doing to Arrington. She had an angle for a story and she did what was necessary to cast him as the bad guy. It's an unfair abuse of power and trust -- power and trust that she clearly doesn't deserve.