Is it time to put our money where our ideals are?

As has been mentioned around here before, most of us believe that the mainstream media is biased and that includes the likes of Google, most networks and newspapers. Should we start thinking about using some of our money to invest in some of these and try and gains some control? I would not mind buying some shares of a radio company, a television network, a newspaper, a search engine and who know what else. If we all do it could we succeed? Could we gain some control and bring those that we own back to a neutral stance?