[indubitable]

Is this an issue with Facebook, or an issue with the society that has yielded the wild success of Facebook?

"I read it on the internet, so it must be true."

Everybody would know I was joking, yet all of this is only an issue precisely because people are insufficiently critical of the things they read. But I'm leaving off an important part of that sentence: ... people are insufficiently critical of the things they read when such things confirm their own biases. People believe what they believe because they believe that is the most logical view to have. That causes people to turn off their filter when seeing something that confirms that belief.

Somebody censoring a belief or attaching an appeal to an arbitrary authority declaring it false isn't going to change people's minds. If anything, it could very well strengthen their resolve as they feel as though they're being oppressed or attacked. There needs to be more cordial debate and discussion between differing groups. I am not suggesting promoting a false balance, but rather pointing out that what we have now is a false balance. So many topics are optically homogenous - which gives participants and readers a gross misunderstanding of reality and leads both to less questioning of their own views, and a lack of understanding of how anybody could ever disagree with them.