These are excellent suggestions. My only reservation is that there need to be procedures in place that allow for the spread of true information about real conspiracies — for example, the collusion by five big banks to fix the exchange rates a couple of years ago. The banks paid some substantial fines and threw a couple of low-level guy under the bus, but otherwise evaded responsibility. Obviously, there is a difference between this story and the rumors of a Clinton-operated pedophile ring operating out of a pizza parlor, and we need to be able to distinguish between them.
If we can’t solve this problem, then indeed we are in a post-truth world, and I don’t know how we survive that. We can hope that when the Singularity occurs, the AIs will at least be able to detect false news and act accordingly. The roughly 135 different human cognitive biases currently listed by Wikipedia pretty much guarantee that we won’t be able to or even want to do much about this problem by ourselves.
As I commented in relation to another article, I’m continually fascinated by how far off those of us who were in on the relatively early stages of the PC and Internet revolution were regarding issues like false info, criminality, spam, and other evil uses of information technology. These ideas just never came up, as we contemplated the rosy future of unlimited access to information and the improvements this would bring to our lives. It wasn’t that we were stupid; just, I suspect, so blinded by the good possibilities that we were painfully naive about the bad. I’m hoping to write more about this down the road.