Re: "the top 1 per cent of false-news cascades routinely diffused to between 1,000 and 100,000"
I have spent quite a bit of time trying to respond and educate the people sending me the latest fraud mail of the day - because many of those were people I personally knew. Some of them do not speak to me anymore; apparently I dared challenge their worldview and they did not accept that.
Unless you had authority over them or they are open minded, challenging their worldview is pointless. If I were you, I would have straightly out pointed out the fraud mail and stop there. If they accept my educate, then good for them. If they don't, then I let Darwinism take in charge.
^Self referencing statement. This comment points out exactly one thing and stops there. If you accept it, then good for you. If not, then I also let Darwinism take in charge.