It's trolling taken to its logical extreme: you literally cannot tell whether someone posting flat-earth 'facts' is a troll or not online. The behaviour of the

It's trolling taken to its logical extreme: you literally cannot tell whether someone posting flat-earth 'facts' is a troll or not online. The behaviour of the acolyte and the troll is identical. Only when you meet these people in real life is there a fair chance of sounding them out to discover if they are just playing along or are actually convinced of whatever conspiracy is being peddled. I would expect most trolls keep their flat-earth proselytizing strictly as an online activity. But they do seem to exist (the true believers that is).