No doubt about it. The lesson that should be taken to heart is that when the SHTF, what you need just to survive will not be available on any shelf in a very short period of time.
The run on gasoline in San Antonio and the surrounding areas was initially driven, I suspect, by the fear of a price hike. That's all it took to create a temporary shortage, everybody just topping off their tank.
That doesn't explain the run on other items though. People were stocking up on bottled water, eggs, milk, bread, and canned goods. Batteries were a hot item too, especially D cells common to most flashlights. Whole sections of shelves were cleaned out at our local grocery store. The cashier said they had just gotten in some bread and eggs when I went in on Thursday, but that was about it. If you were looking for those other items, you were SOL.
bttt
Imagine if this mob psychology was driven by an event that was /1/ national in scope and /2/ showed no sign of a quick solution.
The empty stores, gas stations and ATMs would only be the beginning of the nightmare.