I find a big part of the whole misinformation saga is due to people being inherently lazy.
They hear news from somewhere and, instead of taking the time to research if its true(Something that you often need to do these days) they'll either blindly trust or believe it and spread this belief, whether right or wrong, or be those that simply distrust everything they hear.

If nothing else I find that our overwhelming access to information makes the spread of misinformation far easier and convenient.

I know not of any cure or ways to help this Orwellian dilemma, but I think the transparency of blockchains and community(s) like Steemit are a step in the right direction. A small step, yes, but accountability does wonders when it comes to causing people to care about the quality and truthfulness of what they post.