What bias is most dangerous in the media?

I think the most obvious would be a bias towards Big Business, especially any article which could be critical of the sponsors of a certain show/newspapers.

As far as all of the media generally supporting America’s ongoing wars around the world I think this quote sums it up.

“The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum….”

― Noam Chomsky, The Common Good