This isn't the emergency they were looking for. In fact, I'll bet most committed preppers don't even think of this as a "true emergency," which has a specific visualized scenario for them. Gangs of looters and pillagers coming to their locations to steal their toilet paper, instead of little old ladies buying it all up during senior hour.
But here's a scenario that is resulting in the greatest personal behavioral consequences that I can remember in my lifetime, more than the gas shortages of the early 1980s (I'm meaning the granular, personal level), with most of the population confused and afraid and running out of money - and this is not that. There has been no looting and pillaging, in fact, crime has fallen, and instead of hordes of walking dead moving into the countryside, it's the rich in their carriages, it's (as per above) the gun-buyers going across state lines not to rob, but to spend money.
Actually, you could argue that this is a time that preppers should be breaking out the freeze-dried food, so that they could be spared the danger of contagion at the grocery, but I wonder if any of them are doing so.
Now maybe it will come to the single prepper scenario that they have prepared for, and they will literally have the last laugh, but judging from other countries' experiences, judging from previous times of hardship and uncertainty, even of plague (of which there are many, many historical accounts), they are on the spectrum of connection along with the rest of us, going out to buy supplies as needed, deep cleaning the house, walking the dog, etc. As someone who studied history, I'm trying to record my impressions of this unfolding tragedy and emergency.