The "toilet roll crisis"2 during the COVID-19 pandemic led to businesses enforcing limits on number of rolls customers could take home. And the great (fake) UK oil shortage in 2021 provided us with image after image of cars clogging up roads, all lining up to secure fuel3.
These are both notable examples of how mass panic can be spread by misinformation. But what started as fake news resulted in very real consequences. Panic buying, rather than supply chain issues, led to business interruption and commodity shortages.