Digital information has an unbelievably high R0 [basic reproductive rate], and this means that it's hard to stop once it emerges. It spreads from person to person - even those at a great distance - incredibly quickly, thanks to its high transmissibility and the high interconnectedness of digital society. Once it escapes into the wild, it's all but impossible to stop its spread. This is wonderful, so long as the information is correct and useful. But if it's wrong, if it alters our brains for the worse, if it makes us make mistakes and think incorrect things, it's a scourge.