I don't watch TV at all, not for the last five years anyway. I don't read papers anymore, I listen to certain Radio shows in the mainstream, that seem to be escaping the control (for now), so that is my way of boycotting stuff.
Top of my list (UK wise) would be the BBC. This outfit are still government, and the cover ups and bias are outrageous. OK, they are famous for their quality (ie Animal documentaries and sport etc), and are strictly ad free, but they are still top of my boycott list.
U.S ? CNN and the like, but Fox seems to go out of it's way to pretend they are not mainstream, so I'm not sure about them.
Everyone knows the MSM is owned by 6 Corporations? So just throw the TV out of the window guys....