> People were reading news in FB feed and didn't even think it can be fake, now they read and go "outside" for fact checking.

You know this is an interesting topic in and of itself. Are people looking outside FB for news? I would argue that if FB supports your world view that people aren't looking outside of it. Others have had the same theory:

http://lesswrong.com/lw/lr/evaporative_cooling_of_group_beli...

The reality is that the internet provides a platform to even the most marginal ideas, time cubes, flat earths, and lots of rather stupid ideas that have no basis in logic or reason. If these things appeal to you seeing them in print and on video will only bolster ones false reasoning and allow you to further push out other points of view.